CN113266624A - Rotary valve for high-frequency pulse air pressure modulation - Google Patents
Rotary valve for high-frequency pulse air pressure modulation Download PDFInfo
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- CN113266624A CN113266624A CN202110536994.9A CN202110536994A CN113266624A CN 113266624 A CN113266624 A CN 113266624A CN 202110536994 A CN202110536994 A CN 202110536994A CN 113266624 A CN113266624 A CN 113266624A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/12—Fluid oscillators or pulse generators
- F15B21/125—Fluid oscillators or pulse generators by means of a rotating valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/008—Reduction of noise or vibration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
- F16J15/4476—Labyrinth packings with radial path
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
本发明公开了一种用于高频脉动气压调制的旋转阀，属于动态压力发生技术领域，其目的在于实现波形可控的高频脉动压力调制。本发明结构包括外壳、旋转体、密封环、静止气嘴、旋转分气盘、轴承、卡簧及排气消音盖。旋转分气盘与旋转体通过螺栓连接，由轴承固定安装在外壳内。静止气嘴与旋转分气盘可更换件，静止气嘴可设置开孔形状，旋转分气盘外缘可设置一组均匀分布的特定形状、数量的窗口，用于匹配不同波形的脉动压力，密封环采取迷宫密封形式，在避免动静磨损的情况下减少气流泄漏。相较于其他旋转阀本发明具有结构简单、拆卸方便、灵活性好的特点，并可实现长时间高频气压调制工作而不发热磨损。
The invention discloses a rotary valve for high-frequency pulsating air pressure modulation, which belongs to the technical field of dynamic pressure generation and aims to realize waveform-controllable high-frequency pulsating pressure modulation. The structure of the invention includes a casing, a rotating body, a sealing ring, a static air nozzle, a rotating air distribution plate, a bearing, a circlip and an exhaust muffler cover. The rotating air distributor is connected with the rotating body through bolts, and is fixedly installed in the casing by bearings. The static air nozzle and the rotating air distributor can be replaced. The static air nozzle can be set with the shape of the opening, and the outer edge of the rotating air distributor can be set with a set of uniformly distributed windows of specific shapes and numbers to match the pulsating pressure of different waveforms. The sealing ring adopts the form of labyrinth seal to reduce airflow leakage while avoiding static and dynamic wear. Compared with other rotary valves, the present invention has the characteristics of simple structure, convenient disassembly and good flexibility, and can realize long-term high-frequency air pressure modulation work without heat and wear.
Description
Technical Field
The invention relates to a rotary valve for high-frequency pulse air pressure modulation, and belongs to the technical field of dynamic pressure generation.
Background
In the process of developing national defense and military industry electronic equipment such as aviation, aerospace, weapons and the like, an electrical conversion device is needed to realize dynamic air pressure control, such as pulse air pressure signals under the conditions of simulating instability of an aircraft engine and the like, and dynamic excitation of an air pressure sensor is provided for semi-physical simulation tests of the aircraft engine.
At present, the pulse air pressure generator has various types such as a resonant type, a variable volume type, a jet type, a modulation type and the like. The resonant type air pressure generator has serious waveform distortion when the pressure amplitude is large or the frequency is large. The piston type air pressure generator belongs to the variable volume type, and utilizes the repeated motion of a piston in a cylinder to generate pulsating pressure. However, due to structural limitations, the force externally applied to the piston rod is limited and higher frequencies and larger pressure amplitudes cannot be achieved. Meanwhile, the amplitude and the frequency characteristic are influenced in a coupling mode, and independent adjustment of a single variable cannot be achieved. The jet-type pulsating pressure generator can generate pulsating pressure in a wide frequency range but has smaller amplitude. The modulated air pressure generator adopts a fixed volume of the containing cavity, and the volume of the air in the containing cavity is periodically changed by periodically changing the areas of the outlet and the inlet, so that pulsating pressure is generated. The modulation method is a commonly used method for pulse pressure generators, but the research on the modulation type pulse pressure generator focuses on amplitude and frequency characteristics, and only a sinusoidal waveform can be simulated, but other waveforms cannot be simulated.
Patent CN108561370A discloses a piston type air pressure generator, which reduces the driving force required by the reciprocating motion of the connecting rod, obtains larger pulsating pressure amplitude under the same driving force, but still cannot realize single variable adjustment of amplitude and frequency characteristics. Patent CN207585837U discloses a modulated air pressure generator which adopts a radial outlet to avoid the generation of axial force of the traditional transverse outlet, thus improving the working pressure range, but only generating sinusoidal pressure and being unable to control the waveform.
Disclosure of Invention
The invention discloses a rotary valve for high-frequency pulsating air pressure modulation, belongs to the technical field of dynamic pressure generation, and aims to realize high-frequency pulsating pressure modulation with controllable waveform.
The technical scheme of the invention is as follows:
a rotary valve for modulating high-frequency pulse air pressure structurally comprises a shell 1, a rotating body 2, a sealing ring 3, a static air nozzle 4, a rotary air distribution disc 5, a bearing 6, a clamp spring 7 and an exhaust silencing cover 8. The static air tap 4 is a replaceable part and can be provided with an opening shape, one end of the static air tap is fixed on the shell 1 through threaded connection, and the other end of the static air tap can be connected with an air source through a quick coupling. The rotary air distribution disc 5 is a replaceable part, and a group of windows with specific shapes and numbers which are uniformly distributed can be arranged on the outer edge. The rotary air distribution plate 5 is connected with the rotating body 2 through bolts and is fixedly arranged in the shell 1 through a bearing 6 and a clamp spring 7. The rotating body 2 is driven by a motor through a coupler to rotate, so that the rotating air distribution disc 5 and the static air nozzle 4 are periodically opened and closed through holes. A sealing ring 3 is arranged between the bearing 6 and the rotary gas distribution disc 5. The sealing ring 3 takes the form of a labyrinth seal. And a certain number of threaded holes are reserved on the end surface of the exhaust silencing cover 8, so that a silencing device can be added. After the air source passes through the static air nozzle 4, the air source periodically passes through the rotary air distribution disc 5 and the rotating body 2 and is communicated with the atmosphere after passing through the exhaust silencing cover 8.
Further, the rotary body 2 is provided with a hole at the center thereof to serve as an air passage between the rotary air distribution plate 5 and the exhaust silencing cover 8.
Further, the bearing 6 is a thrust tapered roller bearing which can bear radial force and axial force and is in accordance with GB/T297-.
The invention has the beneficial effects that: the rotary valve for high-frequency pulse air pressure modulation has the advantages that the structure is simple, the adjustment of air pressure amplitude and waveform can be realized only by replacing a static air nozzle or rotating an air distribution disc, other internal components do not need to be replaced, the rotary valve has the characteristics of good flexibility and low cost, a certain number of threaded holes are reserved on the end face of an exhaust silencing cover, a silencing device can be added, the noise in atmosphere communication is reduced, meanwhile, the sealing ring in a labyrinth sealing structure mode is adopted, the leakage of air is reduced in one step, and meanwhile, the long-time high-frequency air pressure modulation work can be realized, and the abrasion and the heating are avoided.
Drawings
FIG. 1 is a block diagram of a rotary valve for high frequency pulsating air pressure modulation in accordance with the present invention.
FIG. 2 is an external view of a rotary valve for dithering air pressure modulation according to the present invention.
FIG. 3 is a schematic view of a stationary air nozzle.
Fig. 4 is a schematic view of a rotating gas distribution plate.
FIG. 5 is a schematic view of the stationary nozzle opening and the corresponding waveform.
Detailed Description
The technical solution of the present invention is further explained with reference to the accompanying drawings.
Referring to the attached figure 1, the rotary valve for high-frequency pulse air pressure modulation structurally comprises a shell 1, a rotating body 2, a sealing ring 3, a static air nozzle 4, a rotary air distribution disc 5, a bearing 6, a clamp spring 7 and an exhaust silencing cover 8. Referring to fig. 3, the stationary nozzle 4 is a replaceable member and can be provided with an opening shape, one end of the nozzle is fixed on the housing 1 through a threaded connection, and the other end of the nozzle can be connected with an air source through a quick coupling. Referring to fig. 4, the rotary gas distribution plate 5 is a replaceable member, and a set of windows with specific shapes and numbers are uniformly distributed on the outer edge. The rotary air distribution plate 5 is connected with the rotating body 2 through bolts and is fixedly arranged in the shell 1 through a bearing 6 and a clamp spring 7. The rotating body 2 is driven by a motor through a coupler to rotate, so that the rotating air distribution disc 5 and the static air nozzle 4 are periodically opened and closed through holes. A sealing ring 3 is arranged between the bearing 6 and the rotary gas distribution disc 5. The sealing ring 3 takes the form of a labyrinth seal. Referring to fig. 2, a certain number of threaded holes are reserved on the end face of the exhaust silencing cover 8, so that a silencing device can be added. After the air source passes through the static air nozzle 4, the air source periodically passes through the rotary air distribution disc 5 and the rotating body 2 and is communicated with the atmosphere after passing through the exhaust silencing cover 8.
In this example, referring to fig. 1, the rotary body 2 is centrally perforated as an air passage between the rotary air distribution plate 5 and the exhaust silencing cover 8.
In this example, with reference to fig. 1, the bearing 6 is a tapered roller thrust bearing that can withstand both radial and axial forces and complies with the standard GB/T297-.
Example 1
The details are further described as follows: the control of the pulsating air pressure frequency is determined by the rotating speed of the motor, and the rotating speed of the motor can be determined according to the required air pressure pulsating frequency f and the number m of rectangular windows opened on the rotary air distribution disc 5:
n＝f/m*60
where the frequency f is in HZ and the motor speed n is in rpm.
The amplitude of the pulsating air pressure can be determined by the opening area, distribution and quantity of the rotary air distribution disc 5 and the opening shape of the static air nozzles 4, and the amplitude of the pulsating air pressure is changed by replacing the rotary air distribution disc 5 and the static air nozzles 4. Meanwhile, a proportional flow valve can be added at the upstream of the static air nozzle 4 to dynamically adjust the amplitude of the pulsating air pressure.
The pulsating air pressure waveform can be determined by the opening area and distribution of the rotary air distribution disc 5 and the opening shape of the static air nozzle 4, and the effective cross-sectional area of the valve hole can be changed by replacing the rotary air distribution disc 5 or the static air nozzle 4 during ventilation, so that the pulsating air pressure waveform can be changed.
Referring to fig. 5, it is a graph of the effective sectional area of the outlet and the pressure waveform of the stationary nozzle 4 corresponding to three different openings, wherein S represents the graph of the effective sectional area and P represents the graph of the pressure waveform. Firstly, the influence of the amplitude is that the pressure amplitude is larger when the effective sectional area of the opening of the static air nozzle 4 is larger. When the effective sectional area is larger under the same pressure, the deflation speed is higher, and the modulation of the waveform can be realized by changing the effective sectional area of the opening.
The specific operation steps used by the rotary valve for modulating the high-frequency pulsating air pressure in the embodiment are as follows:
the first step is as follows: selecting a proper static air nozzle 4 and a proper rotary air distribution disc 5 according to the air pressure amplitude and the waveform to be simulated;
the second step is that: the high-pressure air source is connected to an air inlet of the constant volume cavity through the air inlet proportional flow valve, an air outlet of the constant volume cavity is connected with the rotary valve modulated by the high-frequency pulsating air pressure, a pressure sensor is arranged at an outlet of the constant volume cavity, and the air outlet proportional flow valve can be arranged between the air outlet of the constant volume cavity and the rotary valve modulated by the high-frequency pulsating air pressure and used for adjusting the amplitude through a voltage signal;
the third step: turning on a motor, roughly adjusting the rotating speed of the motor according to the required frequency, turning on and adjusting the opening of an inflation proportional flow valve to a certain set value, and starting an air source to enter a fixed cavity and generate pulsating pressure in the cavity;
the fourth step: analyzing the frequency and amplitude of the current pressure according to the pressure signal acquired by the sensor, correcting the pressure frequency by finely adjusting the rotating speed of the motor, and adjusting the pulsation amplitude by adjusting the opening of the deflation proportional flow valve or replacing the static air nozzle 4;
the fifth step: after the experiment is finished, the aeration proportional flow valve is closed, and the motor is closed after the pressure of the fixed cavity collected by the sensor is atmospheric pressure.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. A rotary valve for high frequency pulsating air pressure modulation, characterized by: comprises a shell (1), a rotating body (2), a sealing ring (3), a static air nozzle (4), a rotary air distribution disc (5), a bearing (6), a clamp spring (7) and an exhaust silencing cover (8); the static air nozzle (4) is a replaceable part and can be provided with an opening shape, one end of the static air nozzle is fixedly connected to the shell (1) through threads, and the other end of the static air nozzle can be connected with an air source through a quick connector; the rotary air distribution disc (5) is a replaceable part, and a group of windows with specific shapes and numbers are uniformly distributed on the outer edge; the rotary air distribution disc (5) is connected with the rotating body (2) through a bolt and is fixedly arranged in the shell (1) through a bearing (6) and a clamp spring (7); the rotating body (2) is driven by a motor through a coupler to rotate, so that the rotating air distribution disc (5) and the opening of the static air nozzle (4) are periodically switched on and off; a sealing ring (3) is arranged between the bearing (6) and the rotary air distribution disc (5); the sealing ring (3) takes the form of a labyrinth seal; a certain number of threaded holes are reserved on the end face of the exhaust silencing cover (8), so that a silencing device can be added; after an air source passes through the static air nozzle (4), the air source is communicated with the atmosphere through the exhaust silencing cover (8) periodically through the rotary air distribution disc (5) and the rotating body (2).
2. A rotary valve for dithering air pressure modulation as recited in claim 1, wherein: the rotary body (2) is provided with a hole at the center and is used as an air passage between the rotary air distribution disc (5) and the exhaust silencing cover (8).
3. A rotary valve for dithering air pressure modulation as recited in claim 1, wherein: the bearing (6) is a thrust tapered roller bearing which can bear radial force and axial force and conforms to GB/T297-1994.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110536994.9A CN113266624A (en) | 2021-05-17 | 2021-05-17 | Rotary valve for high-frequency pulse air pressure modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110536994.9A CN113266624A (en) | 2021-05-17 | 2021-05-17 | Rotary valve for high-frequency pulse air pressure modulation |
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| Publication Number | Publication Date |
|---|---|
| CN113266624A true CN113266624A (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110536994.9A Pending CN113266624A (en) | 2021-05-17 | 2021-05-17 | Rotary valve for high-frequency pulse air pressure modulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116146522A (en) * | 2022-10-24 | 2023-05-23 | 大连海事大学 | Flow pulsation generating device with replaceable valve plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2319347A (en) * | 1941-06-05 | 1943-05-18 | Warren B Reed | Valve control |
| GB1557314A (en) * | 1975-11-17 | 1979-12-05 | Graystone Corp | Vibratory drive mechanism |
| CN102966643A (en) * | 2012-11-22 | 2013-03-13 | 裕东（中山）机械工程有限公司 | Mechanical rotary pulse gas generator |
| CN105508334A (en) * | 2015-12-31 | 2016-04-20 | 北京航空航天大学 | Electrically driven multilateral overflow pulse attenuation control system and multilateral overflow system |
| CN107489783A (en) * | 2017-09-22 | 2017-12-19 | 兰州理工大学 | A kind of noise elimination V-type ball valve with combined pore plate |
| CN209164221U (en) * | 2018-10-25 | 2019-07-26 | 浙江工业大学 | 2D PWM Mechanism |
-
2021
- 2021-05-17 CN CN202110536994.9A patent/CN113266624A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2319347A (en) * | 1941-06-05 | 1943-05-18 | Warren B Reed | Valve control |
| GB1557314A (en) * | 1975-11-17 | 1979-12-05 | Graystone Corp | Vibratory drive mechanism |
| CN102966643A (en) * | 2012-11-22 | 2013-03-13 | 裕东（中山）机械工程有限公司 | Mechanical rotary pulse gas generator |
| CN105508334A (en) * | 2015-12-31 | 2016-04-20 | 北京航空航天大学 | Electrically driven multilateral overflow pulse attenuation control system and multilateral overflow system |
| CN107489783A (en) * | 2017-09-22 | 2017-12-19 | 兰州理工大学 | A kind of noise elimination V-type ball valve with combined pore plate |
| CN209164221U (en) * | 2018-10-25 | 2019-07-26 | 浙江工业大学 | 2D PWM Mechanism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116146522A (en) * | 2022-10-24 | 2023-05-23 | 大连海事大学 | Flow pulsation generating device with replaceable valve plate |
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Application publication date: 20210817 |
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