CN109579952B - Commutator nozzle with adjustable opening degree - Google Patents
Commutator nozzle with adjustable opening degree Download PDFInfo
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- CN109579952B CN109579952B CN201910079175.9A CN201910079175A CN109579952B CN 109579952 B CN109579952 B CN 109579952B CN 201910079175 A CN201910079175 A CN 201910079175A CN 109579952 B CN109579952 B CN 109579952B
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- connecting rod
- rectifying plate
- nozzle
- workbench
- screw
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Coating Apparatus (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to a commutator nozzle with adjustable opening degree, which comprises a nozzle body; the first rectifying plate and the second rectifying plate are symmetrically arranged; the upper part of the first rectifying plate is provided with a first rotating connecting piece, and the first rotating connecting piece is connected to the screw rod workbench through at least one connecting rod; the upper part of the second rectifying plate is provided with a second rotary connecting piece, and the second rotary connecting piece is connected to the lead screw workbench through at least one connecting rod; the lead screw workbench can move up and down. The nozzle of the commutator can adjust the capability of the area of the water outlet of the nozzle according to the flow, so that the flow velocity of the outlet of the nozzle reaches the preset ideal flow velocity, and the stable, continuous and continuous outflow of the flow field of the outlet can be ensured under low flow.
Description
Technical Field
The invention relates to a nozzle, in particular to a commutator nozzle with adjustable opening degree.
Background
The flow measurement is one of the important components of modern measurement science, and aims to obtain a reliable and accurate measurement value of the flow value through a scientific and technical method. The flow measurement is widely applied to various fields of national production and life, such as scientific research, industrial production, agricultural production, national defense construction, foreign trade and the like. The flow standard device is used for calibrating the flow meters except the standard throttling device, and technical indexes such as measuring range, repeatability, meter coefficient, uncertainty and the like of the flow meters are determined by performing experiments and calibration on the flow meters.
The uncertainty of the diverter is the most dominant component of the system uncertainty that constitutes a standard means of liquid flow. The calibration of the commutator uncertainty is an important part of the calibration of the flow calibration device. Taking a static mass method device as an example, the uncertainty of the flow standard device mainly comes from factors such as a timer, a weighing system, a commutator, a communicating pipeline and the like, and the uncertainty is synthesized to be called the synthetic uncertainty of the device, wherein the uncertainty from the commutator is the most main component of the uncertainty of the device. In particular, the uniformity and stability of the flow field at the exit of the commutator nozzle has a significant impact on commutator uncertainty.
Therefore, how to improve the uniformity and stability of the outlet flow field of the nozzle of the commutator and reduce the uncertainty of the commutator becomes the research focus direction of the liquid flow standard device.
Disclosure of Invention
The invention provides a design of a symmetrical opening-adjustable commutator nozzle, which can enlarge the using flow range of a commutator and reduce the uncertainty of a flow standard device through a continuously adjustable synchronous triggering system.
The commutator nozzle of the invention comprises a commutator nozzle with adjustable opening degree, which comprises; the first rectifying plate and the second rectifying plate are symmetrically arranged; the upper part of the first rectifying plate is provided with a first rotating connecting piece, and the first rotating connecting piece is connected to the screw rod workbench through at least one connecting rod; the upper part of the second rectifying plate is provided with a second rotary connecting piece, and the second rotary connecting piece is connected to the lead screw workbench through at least one connecting rod; the lead screw workbench can move up and down.
Wherein, form sliding seal between first cowling panel and second cowling panel and first fixed plate and second fixed plate.
Wherein, adopt embedded U type steel band between cowling panel and fixed plate.
The first rotary connecting piece is connected with a first connecting rod, the first connecting rod is connected with a second connecting rod, the second connecting rod is connected with a first driving arm, and the first driving arm is connected to the screw rod workbench.
The second rotary connecting piece is connected with a third connecting rod, the third connecting rod is connected with a fourth connecting rod, the fourth connecting rod is connected to a second driving arm, and the second driving arm is connected to the screw rod workbench.
The screw rod workbench is arranged on the screw rod nut support.
The nozzle of the commutator can adjust the capability of the area of the water outlet of the nozzle according to the flow, so that the flow velocity of the outlet of the nozzle reaches the preset ideal flow velocity, and the stable, continuous and continuous outflow of the flow field of the outlet can be ensured under low flow. The nozzle and the pipeline are in a full pipe flow state at any flow rate through the opening adjustment of the nozzle of the commutator, and no air enters.
Drawings
FIG. 1 is a schematic structural view of an adjustable-opening nozzle of a commutator of the present invention;
fig. 2 is a schematic structural view of a U-shaped sealing tape of the present invention;
fig. 3 illustrates a method of controlling the adjustable nozzle of the present invention.
Detailed Description
To facilitate an understanding of the present invention, embodiments of the present invention will be described below with reference to the accompanying drawings, and it will be understood by those skilled in the art that the following descriptions are provided only for the purpose of illustrating the present invention and are not intended to specifically limit the scope thereof.
Fig. 1 shows an opening-adjustable nozzle for a diverter according to the present invention, which has the capability of adjusting the area of the water outlet of the nozzle according to the flow rate, so that the flow rate of the outlet of the nozzle reaches a preset ideal flow rate, and the stable, continuous and continuous outflow of the flow field of the outlet can be ensured at a low flow rate. The nozzle and the pipeline are in a full pipe flow state at any flow rate through the opening adjustment of the nozzle of the commutator, and no air enters.
The commutator nozzle 1 comprises a first rectifying plate 2 and a second rectifying plate 3, wherein the first rectifying plate 2 and the second rectifying plate 3 are symmetrically arranged, and preferably the first rectifying plate 2 and the second rectifying plate 3 are made of stainless steel or plastic or polymer materials or other rigid materials. The upper portion of first cowling panel 2 has first rotation connecting piece, first rotation connecting piece is connected to lead screw workstation 7 through at least one connecting rod, and is further, at least one connecting rod includes first connecting rod 4 and second connecting rod 5, first rotation connecting piece links to each other with first connecting rod 4, first connecting rod 4 links to each other with second connecting rod 5, rotatable coupling between first connecting rod 4 and the second connecting rod 5, second connecting rod 5 is connected to first actuating arm 6, first actuating arm 6 is connected to lead screw workstation 7, lead screw workstation 7 sets up on lead screw nut support 8, fixed support 9 and lower fixed support 10 are connected to respectively to the both ends of lead screw nut support 8.
The upper portion of the second fairing 3 is provided with a second rotary connecting piece, the second rotary connecting piece is connected to the screw workbench 7 through at least one connecting rod, further, the at least one connecting rod comprises a third connecting rod 11 and a fourth connecting rod 12, the second rotary connecting piece is connected with the third connecting rod 11, the third connecting rod 11 is connected with the fourth connecting rod 12, the third connecting rod 11 is rotatably connected with the fourth connecting rod 12, the fourth connecting rod 12 is connected with a second driving arm 13, the second driving arm 13 is connected to the screw workbench 7, the first driving arm 6 and the second driving arm 13 are located on two sides of the screw workbench 7, the first driving arm 6 and the second driving arm 13 are fixedly connected with the screw workbench 7, and riveting or fixed connection with an adjustable angle can be adopted.
The first connecting rod 4, the second connecting rod 5 and the first driving arm 6 are positioned at one side of the screw rod workbench 7, the third connecting rod 11, the fourth connecting rod 12 and the second driving arm 13 are positioned at the other side of the screw rod workbench 7, wherein, the first connecting rod 4 and the third connecting rod 11 are symmetrical in position, the second connecting rod 5 and the fourth connecting rod 12 are symmetrical in position, the first driving arm 6 and the second driving arm 13 are symmetrical in position, when the position of the screw workbench 7 relative to the upper fixed support 9 and the lower fixed support 10 changes, the first driving arm 6 and the second driving arm 13 respectively positioned at two sides keep synchronous motion, thereby driving the second connecting rod 5 and the fourth connecting rod 12 to have the same motion state, correspondingly keeping the motion of the first rectifying plate 2 and the second rectifying plate synchronous, thereby adjusting the size of the opening between the lower part of the first rectifying plate 2 and the lower part of the second rectifying plate 3.
First cowling panel 2 and second cowling panel 3 are located between first fixed plate 14 and second fixed plate 15, form sliding seal between the fixed plate of two cowling panels and both sides, form sliding seal between first cowling panel 2 and second cowling panel 3 and first fixed plate 14 and second fixed plate 15 promptly. The sliding seal is of an internal pressure type, namely a sealing strip with an embedded U-shaped steel strip is adopted between the rectifying plate and the fixing plate, and the structure of the U-shaped sealing strip is shown in figure 2. In addition, the sealing strip is also arranged between the fixed plate, the rectifying plate and the upper transition pipeline to form sealing, so that the fluid entering the adjustable nozzle is ensured not to overflow. The number of the sealing tapes is not limited and can be set as required. Compare in ordinary O shape sealing strip, even under the condition of system non-pressure, built-in U shaped steel band also can reach sealed effect through self expansion force, when having pressure in the system, pressure conduction to U type intracavity can make intracavity pressure increase, and the sealing strip inflation, and sealed clearance reduces, makes sealed effect better.
In the above embodiments, the driving structure is located on the side wall of the second fixing plate 15, but of course, the driving structure may also be located on the side wall of the first fixing plate 14. As a further improvement, the same structure may be provided on the first fixing plate 14, that is, the same structure for driving the first current plate 2 and the second current plate 3 may be provided on the first fixing plate 14 and the second fixing plate 15.
The invention provides a design for driving rectifying plates by a lead screw to enable the rectifying plates on two sides to move symmetrically, as shown in figure 1, a lead screw workbench 7 can move up and down, the lead screw workbench 7 is driven to work by a motor, specifically, the motor drives a lead screw nut support 8 to rotate, the lead screw is further driven to rotate by the lead screw nut support 8, the lead screw drives the lead screw workbench 7 to move up and down by the rotation of the lead screw, a mechanical arm drives a connecting rod to rotate around a rotating shaft fixed on a fixed side plate, the two rotating shafts move symmetrically to drive the rectifying plates to move symmetrically, and the adjustment of the opening degree of a nozzle outlet is realized. The rectifying plate is located between the first fixing plate and the second fixing plate and is clamped by the two fixing plates. The two sides of the lower part of the rectifying plate and the two sides of the fixing plate form a rectangular outlet with the width of the nozzle of the commutator being variable.
When the nozzle of the commutator is driven by a motor, and the opening of the nozzle needs to be adjusted, the motor drives the nut support 8 to rotate, the screw rod workbench 7 translates up and down to drive the first driving arm and the second driving arm to rotate around two side shafts of the workbench, the two driving arms move symmetrically to drive the driving connecting rod to rotate around a tail end shaft of the driving arm, and the connecting rod drives the rectifying plate to move symmetrically so as to achieve the purpose of adjusting the opening of the nozzle of the commutator.
The motor drives the commutator nozzle rectifying plate to realize the opening adjustment of the commutator nozzle, the process is realized through a plurality of groups of connecting rod mechanisms, in order to ensure the symmetrical motion of the nozzle rectifying plate, the rectifying plate is driven around a shaft through a plurality of groups of connecting rods, but the motor can generate return error due to the accumulation of micro deformation in the motion of a mechanical structure in the process, namely, the motor can generate positive and negative stroke difference to the nozzle opening at the same accumulated revolution in the positive and negative rotation processes.
In order to compensate for return stroke errors, the return stroke of each adjustment needs to be ensured to be consistent, so that the return stroke needs to be adjusted to the maximum value each time after the opening is set, and then the corresponding relation between the motor feeding rotation number and the opening is accurately calibrated by combining the corresponding relation between the calibration opening and the motor rotation number, so that the return stroke is accurately adjusted to the expected opening. And a limit switch is arranged at the maximum opening, and is triggered when the maximum opening is reached, and the motor is stopped to rotate. Fig. 3 shows a method for controlling an adjustable nozzle.
It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (2)
1. An adjustable opening commutator nozzle, which comprises; the first rectifying plate and the second rectifying plate are symmetrically arranged; the method is characterized in that:
the upper part of the first rectifying plate is provided with a first rotating connecting piece, and the first rotating connecting piece is connected to the lead screw workbench through a first connecting rod and a second connecting rod; the first rotary connecting piece is connected with a first connecting rod, the first connecting rod is connected with a second connecting rod, the second connecting rod is connected with a first driving arm, and the first driving arm is connected to the screw rod workbench;
the upper part of the second rectifying plate is provided with a second rotary connecting piece, and the second rotary connecting piece is connected to the lead screw workbench through a third connecting rod and a fourth connecting rod; the second rotary connecting piece is connected with a third connecting rod, the third connecting rod is connected with a fourth connecting rod, the fourth connecting rod is connected to a second driving arm, and the second driving arm is connected to the screw rod workbench;
the first connecting rod and the third connecting rod are symmetrical in position, the second connecting rod and the fourth connecting rod are symmetrical in position, and the first driving arm and the second driving arm are symmetrical in position;
the nozzle of the commutator is driven by a motor, when the opening needs to be adjusted, the opening is adjusted to the maximum each time after the opening is set, and then the corresponding relation between the motor feeding revolution and the opening is accurately calibrated by combining the corresponding relation between the calibration opening and the motor revolution, so that the opening is accurately adjusted to the expected opening;
the first rectifying plate and the second rectifying plate are positioned between the first fixing plate and the second fixing plate, sliding seals are formed between the first rectifying plate and the second rectifying plate and between the first fixing plate and the second fixing plate, and the sliding seals are of an internal pressure type;
the screw rod workbench is arranged on a screw rod nut support, and two ends of the screw rod nut support are respectively connected to the upper fixing support and the lower fixing support; the screw nut support drives the screw to rotate, and the rotation of the screw drives the screw workbench to move up and down.
2. The diverter nozzle according to claim 1, wherein: an embedded U-shaped steel belt is adopted between the two rectifying plates and the two fixing plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079175.9A CN109579952B (en) | 2019-01-28 | 2019-01-28 | Commutator nozzle with adjustable opening degree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910079175.9A CN109579952B (en) | 2019-01-28 | 2019-01-28 | Commutator nozzle with adjustable opening degree |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109579952A CN109579952A (en) | 2019-04-05 |
| CN109579952B true CN109579952B (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910079175.9A Active CN109579952B (en) | 2019-01-28 | 2019-01-28 | Commutator nozzle with adjustable opening degree |
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| Country | Link |
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| CN (1) | CN109579952B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380599B (en) * | 2020-04-24 | 2024-07-02 | 开封仪表有限公司 | Commutator for improving accuracy of flow standard device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4147027A (en) * | 1976-04-06 | 1979-04-03 | Grumman Aerospace Corporation | Thrust reverser nozzle |
| US4502639A (en) * | 1982-04-26 | 1985-03-05 | Rolls-Royce Inc. | Turbomachine ejector nozzle |
| CN101788323B (en) * | 2010-02-11 | 2011-08-24 | 浙江省计量科学研究院 | Commutator of water flow standard device and commutation method thereof |
| CN203502089U (en) * | 2013-09-18 | 2014-03-26 | 宁波明泰流量设备有限公司 | Adjustable reverser |
-
2019
- 2019-01-28 CN CN201910079175.9A patent/CN109579952B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| "水流量装置电动换向器研究";孙立军 等;《工程设计学报》;20151031;第22卷(第5期);第487-492页 * |
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| CN109579952A (en) | 2019-04-05 |
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