CN109701761B - Self-excitation blocking type pulse jet flow generation method - Google Patents
Self-excitation blocking type pulse jet flow generation method Download PDFInfo
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- CN109701761B CN109701761B CN201910040905.4A CN201910040905A CN109701761B CN 109701761 B CN109701761 B CN 109701761B CN 201910040905 A CN201910040905 A CN 201910040905A CN 109701761 B CN109701761 B CN 109701761B
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Abstract
The invention discloses a self-excitation blocking type pulse jet flow generating method, which adopts a generator comprising a shell and a rotor arranged in the shell, wherein the rotor is provided with impeller grooves distributed in the circumferential direction and overflowing channels penetrating through two sides of the rotor; the pressurized fluid in the second injection channel can not flow temporarily under the obstruction of the rotor, when the rotor rotates to the position that the overflowing channel is opposite to the outlet of the second injection channel, the outflow channel at the other end of the shell is just communicated with the outlet of the overflowing channel, the fluid in the second injection channel enters the outflow channel through the overflowing channel, and pulse jet flow is formed at the outlet of the outflow channel. The invention utilizes the fluid in the generator to drive the rotor, thereby leading the rotor to be capable of blocking the ejection of the fluid and achieving the purpose of pulse jet.
Description
Technical Field
The invention relates to the technical field of jet flow, relates to a pulse jet flow generation method, and particularly relates to a self-excitation blocking type pulse jet flow generation method.
Background
The pulse jet flow has enough high energy formed through energy gathering, pressure extrusion, flow regulation and other modes, and produces water hammer pressure with relatively high energy continuously during the jet flow process, so that the pulse jet flow has material eliminating capacity superior to that of continuous jet flow and wide application foreground in industrial society.
The pulse jet can be classified into a self-excited pulse jet and an separately excited pulse jet according to the generation manner thereof. The research mechanism of the self-excited pulse jet is complex, and most of the current researches are self-excited oscillation pulse jets. The pulse jet flow can be realized in various forms, and the modes of energy gathering, quick release, pressure extrusion, flow regulation and the like are available. The mechanical pulse jet device has the advantages of simple structure, simple and easy sealing and high reliability.
Disclosure of Invention
The present invention aims to rotate a rotor at a constant speed inside a casing by means of flow rate regulation by means of impact of a fluid on a rotor wheel groove. When the rotor rotates to a certain angle, the radial overflowing channel of the rotor enables the injection channel and the outflow channel of the shell to be communicated with each other so as to obtain self-excited pulse jet flow. The rotor is arranged in the device, so that the device is small and simple in structure as much as possible and convenient to maintain.
In order to solve the technical problems, the invention adopts the technical scheme that:
a self-excitation blocking type pulse jet generation method is characterized in that: including the casing with locate the rotor in the casing, be equipped with the impeller groove of circumference distribution on the rotor and run through at least one of rotor both sides and overflow the passageway, casing one end is equipped with two injection channels, and the other end is equipped with an outflow passageway, and the first injection channel among two injection channels accesss to the impeller groove of circumference distribution on the rotor, and second injection channel intermittent type nature intercommunication overflows one side of passageway, and concrete pulse jet takes place the method as follows:
injecting pressurized fluid into the two injection channels simultaneously, wherein the fluid in the first injection channel impacts the impeller groove so as to drive the rotor to periodically rotate;
the pressurized fluid in the second injection channel can not flow temporarily under the obstruction of the rotor, when the rotor rotates to the position that the overflowing channel is opposite to the outlet of the second injection channel, the outflow channel at the other end of the shell is just communicated with the outlet of the overflowing channel, the fluid in the second injection channel enters the outflow channel through the overflowing channel, and primary jet flow is generated at the outlet of the outflow channel;
the overflowing channel on the rotor intermittently communicates the second injection channel with the outflow channel along with the continuous rotation of the rotor under the impact action of the fluid in the first injection channel, and once the overflowing channel is communicated, jet flow is generated, and pulse jet flow is formed through intermittent communication.
As an improvement, the first injection passage and the second injection passage are connected with the same pressure source pipeline, and the pulse frequency is adjusted through the pressure or flow of the same pressure fluid.
As an improvement, one or more overflowing channels are arranged on the rotor, and the pulse jet frequency can be adjusted by setting the number of the overflowing channels.
As an improvement, the shell is provided with a containing cavity for installing the rotor from the side surface, the rotor is installed in the containing cavity through the plug, two ends of the rotor are processed into conical surfaces or limiting shafts, and conical grooves or clamping grooves capable of limiting the rotor are processed in the shell and corresponding parts of the plug.
As an improvement, the rotor body is a revolving body, the rotor is divided into an impeller groove section and a cylindrical section, one end of the overflowing channel is arranged in the cylindrical section of the rotor, the other end of the overflowing channel is arranged in an impeller groove of the impeller groove section on the opposite side of the rotor, the overflowing channel corresponds to the second injection channel in the axial position of the cylindrical section, and the cylindrical section of the rotor is in clearance fit with the inner part of the accommodating cavity, so that the second injection channel and the outflow channel cannot be directly communicated.
As an improvement, the impeller groove is formed by processing a groove on the surface of the rotor or welding a raised blade on the surface of the rotor.
As a modification, the shape of the housing is any one of a cylindrical shape, an elliptic cylindrical shape, a polygonal cylindrical shape, a rectangular parallelepiped shape, and a square shape.
As an improvement, the casing is cylindrical, the second injection channel is eccentrically arranged at the end of the cylinder and corresponds to the cylindrical section of the rotor, and the first injection channel is eccentrically arranged relative to the axis of the rotor and corresponds to the impeller groove section of the rotor.
As an improvement, a sealing ring is arranged on the end face where the plug and the shell are connected with each other.
The invention has the beneficial effects that:
the invention utilizes the flow regulation mode to lead the rotor to rotate in the shell ceaselessly through the impact of fluid on the impeller groove. When the rotor rotates to a certain angle, the radial overflowing channel of the rotor enables the injection channel and the outflow channel of the shell to be communicated with each other so as to obtain self-excited pulse jet flow. The rotor is arranged in the device, so that the device is small and simple as much as possible, and the structure is more complicated due to the increase of driving force is avoided; the design of the replaceable rotor facilitates the maintenance of the device; the design of multiple injection channels can achieve a variation in pulse frequency through the input of flow.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the self-excited blocking type pulse jet generating device.
Fig. 2 is a left side view of the self-excited blocking type pulse jet generating device of the present invention.
Fig. 3 is a cross-sectional view of the self-excited blocking type pulse jet generating device of the present invention.
Fig. 4 is a sectional view taken along line B-B in fig. 3.
Fig. 5 is a cross-sectional view of the housing of the present invention.
Fig. 6 is a sectional view taken along line a-a of fig. 5.
Fig. 7 is a schematic view of a rotor structure according to an embodiment of the present invention.
Fig. 8 is a cross-sectional view of a rotor in an embodiment of the present invention.
Fig. 9 is a cross-sectional view of the lobed portion of the rotor of fig. 8.
Fig. 10 is a schematic view of a rotor structure with three flow-through channels.
Fig. 11 is a schematic view of a plug structure.
Reference numerals: 1-shell, 2-rotor, 3-plug, 4-first injection channel, 5-second injection channel, 6-outflow channel, 7-flow channel, 8-threaded hole, 9-conical surface, 10-conical groove, 11-impeller groove, 12-containing cavity, 13-plug hole and 14-limiting shaft.
Detailed Description
The invention will be further described with reference to the accompanying drawings. It is to be understood that the drawings in the following description are merely illustrative of one embodiment of the invention.
The present embodiment provides a self-excitation blocking type pulse jet generating device, as shown in fig. 1 to 9, comprising a housing 1, a rotor 2 and a plug 3. In this embodiment, the casing 1 is cylindrical, be equipped with the impeller groove 11 of circumference distribution and run through the passageway 7 that overflows of rotor 2 both sides on the rotor 2, casing 1 one end is equipped with two injection channels, and the other end is equipped with an outflow channel 6, and first injection channel 4 among two injection channels leads to the impeller groove 11 of rotor 2 circumference distribution, and second injection channel 5 is because rotor 2 rotation effect intermittent type nature intercommunication overflows one side of passageway 7, and when second injection channel 5 communicates one side of overflowing passageway 7, the outflow channel 6 of the casing 1 other end just communicates the opposite side that overflows passageway 7 and forms pulse jet, when the fluid entered from first injection channel 4, constantly impacted the impeller groove 11 of rotor 2. At this time, the kinetic energy of the fluid acts on the wall surface of the impeller groove 11, and a rotational moment acts on the rotational center axis of the rotor 2, thereby rotating the rotor 2. When the rotor 2 rotates to a certain angle, the flow-passing channels 7 distributed in the radial direction of the rotor 2 are communicated with the second injection channels 5 and the second outflow channels 6 arranged at the two ends of the shell 1. Namely, under the impact action of the fluid, the rotor 2 rotates continuously, and the device can output pulse jet flow with a certain frequency. The two injection channels of the shell 1 can be supplied with fluid by the same pipeline or different pipelines, and the rotating speed of the rotor 2 is adjusted by the fluid pressure of the first injection channel 4 to obtain pulse jet flows with different frequencies.
As shown in fig. 2 and 3, the housing 1 is provided with a first injection passage 4, a second injection passage 5, an outflow passage 6, a housing chamber 12, and a plug hole 13. The cross section of the device is circular. The first injection passage 4 and the second injection passage 5 are provided eccentrically at the end of the housing 1. The side surface of the middle part of the shell 1 is provided with a step-shaped hole groove which is an accommodating cavity 12 for installing the rotor 2, and the bottom end of the inside of the shell is provided with a conical limiting surface for limiting the movement position of the rotor 2 (namely, the rotor 2 can only rotate around the axis of the rotor 2); the outer part is a sealing surface for installing the plug 3 and is sealed by a sealing ring. The rear end of the device is provided with a threaded hole 8 connected with a pipeline, and the openings of the two injection channels are arranged at the bottom eccentric position in the threaded hole 8. One flow channel leads to the impeller grooves 11 which are arranged on the rotor 2 and distributed in the circumferential direction, so that the impeller grooves 11 are impacted by fluid to enable the rotor 2 to rotate, and the flow channel is a first injection channel 4; one flow channel leads to a radially distributed transfer channel 7 provided in the rotor 2 so that the injection channel can communicate with the outflow channel 6 at the rear end of the device when the rotor 2 is rotated to a certain angle, being the second injection channel 5. The outflow channel 6 is arranged in the centre of the axis of the housing 1. The middle part of the shell 1 is drilled with a step-shaped hole cavity. The bottom of the chamber is a chamber 12 for accommodating the rotor 2, and the rotor 2 is in clearance fit with the bore to ensure that the rotor 2 can easily rotate in the bore and that fluid is not easily leaked out of the flow passage. The outer part is provided with a threaded hole 8 for installing the plug 3. The housing 1 is sealed by a plug 3. And a sealing ring is arranged on the end surface of the screw plug 3 connected with the shell 1.
As shown in fig. 7, 8 and 9, the rotor 2 is provided with a flow passage 7 and an impeller groove 11, the rotor 2 body is a revolving body, the rotor 2 is divided into an impeller groove 11 section and a cylindrical section, in this embodiment, the rotor 2 body is a cylinder, conical surfaces 9 with a limiting effect are processed at two ends of the cylinder, a circle of groove is processed at the middle part as the impeller groove 11, the part without the groove is the cylindrical section, one end of the flow passage 7 is positioned on the cylindrical surface of the rotor 2, and is matched with the second injection passage 5 of the housing 1 at the axial position of the rotor 2, and the other end is positioned in the impeller groove 11 at the opposite side, and is matched with the outflow passage 6 of the housing 1 at the axial position of the rotor 2. The machining ensures that the second inlet channel 5, the transfer channel 7 and the outlet channel 6 can communicate. During machining, the flow channel 7 can be drilled first, and then the impeller grooves 11 distributed in the circumferential direction can be milled by a milling cutter.
As shown in fig. 10, in another embodiment of the rotor 2, the rotor 2 is formed by processing a cylinder, the limiting shafts 14 are processed at two ends of the rotor 2, and the corresponding accommodating cavity of the housing and the corresponding shaft hole (not shown in the figure) are processed at the end of the plug, in this embodiment, there are three flow passage 7, the number of the flow passage 7 can be changed to change the outflow frequency, and when the rotor rotates for one circle, the second injection passage 5 is communicated with the outflow passage 6 for three times, so that the present invention has two ways of adjusting the pulse jet frequency, one is to adjust the pulse jet frequency by adjusting the fluid pressure in the first injection passage 4, thereby adjusting the rotation speed of the rotor 2, and the other is to adjust the pulse jet frequency by setting the number of the flow passage 7.
It should be noted that the rotor 2 body of the present invention may be a cylinder or a cylinder with a variable cross-section, as long as it is satisfied that the fluid in the second injection channel 5 cannot directly communicate with the outflow channel 6 at the other end through the gap between the rotor 2 and the inner wall of the housing 1, that is, at least the cylindrical section or the impeller groove 11 section of the rotor 2 is in clearance fit with the inside of the accommodating cavity 12, so that the second injection channel 5 and the outflow channel 6 cannot directly communicate with each other.
When the cylindrical section provided with the overflowing channel 7 is in clearance fit with the inner wall of the accommodating cavity 12, a good isolation effect can be achieved between the second injection channel 5 and the outflow channel 6, at the moment, the impeller groove 11 can be a groove machined in the surface of the rotor 2 or a groove formed by protruding blades welded on the surface of the rotor 2, even the middle part of the rotor 2 can be an impeller in any common prior art, as long as fluid in the first injection channel 4 can impact the rotor 2 to enable the rotor 2 to rotate.
As shown in fig. 11, the middle of the end part of the plug 3 is provided with a conical groove 10 for limiting, and the end part is sunk flat for installing a sealing ring.
The invention relates to a self-excitation blocking type pulse jet flow generating method, which can adjust the rotating speed of a rotor 2 by adjusting the fluid pressure impacting an impeller groove 11 on the rotor 2 so as to obtain pulse jet flows with different frequencies.
When the jet flow generator is used, one end of the outflow channel 6 is connected with an outlet pipeline or a jet generator nozzle, one end of the injection channel is connected with a pressure source in a fluid mode, and the rotating speed of the rotor 2 is adjusted by controlling the pressure of the fluid in the first injection channel 4, so that the second injection channel 5 is communicated with the outflow channel 6 intermittently through the overflowing channel 7 to form pulse jet flow with a certain frequency.
The above description is an example of the present invention and is not intended to limit the present invention in any way, and any simple modification, equivalent changes and modifications, such as the use of different limits for the two sides of the rotor 2 from the conical surface 9, the change of the number of the injection channels of the housing 1, the change of the number and shape of the flow-through channels 7 and the impeller grooves 11 of the rotor 2, etc., fall within the scope of the present invention.
Claims (8)
1. A self-excitation blocking type pulse jet generation method is characterized in that: the device comprises a shell and a rotor arranged in the shell, wherein the rotor is provided with impeller grooves distributed in the circumferential direction and at least one overflowing channel penetrating through two sides of the rotor, one end of the shell is provided with two injection channels, the other end of the shell is provided with an outflow channel, a first injection channel of the two injection channels leads to the impeller grooves distributed in the circumferential direction on the rotor, and a second injection channel is intermittently communicated with one side of the overflowing channel; the rotor body is a revolving body, the rotor is divided into an impeller groove section and a cylindrical section, one end of the overflowing channel is arranged in the cylindrical section of the rotor, the other end of the overflowing channel is arranged in the impeller groove of the impeller groove section on the opposite side of the rotor, the overflowing channel corresponds to the second injection channel in the axial position of the cylindrical section, and the cylindrical section of the rotor is in clearance fit with the inner part of the accommodating cavity, so that the second injection channel and the outflow channel cannot be directly communicated; the specific pulse jet generation method comprises the following steps:
injecting pressurized fluid into the two injection channels simultaneously, wherein the fluid in the first injection channel impacts the impeller groove so as to drive the rotor to periodically rotate;
the pressurized fluid in the second injection channel can not flow temporarily under the obstruction of the rotor, when the rotor rotates to the position that the overflowing channel is opposite to the outlet of the second injection channel, the outflow channel at the other end of the shell is just communicated with the outlet of the overflowing channel, the fluid in the second injection channel enters the outflow channel through the overflowing channel, and primary jet flow is generated at the outlet of the outflow channel;
the overflowing channel on the rotor intermittently communicates the second injection channel with the outflow channel along with the continuous rotation of the rotor under the impact action of the fluid in the first injection channel, and once the overflowing channel is communicated, jet flow is generated, and pulse jet flow is formed through intermittent communication.
2. A self-excited blocking type pulse jet generating method as claimed in claim 1, wherein: the first injection passage and the second injection passage are connected with the same pressure source pipeline, and the pulse frequency is adjusted through the pressure or flow of the same pressure fluid.
3. A self-excited blocking type pulse jet generating method as claimed in claim 1, wherein: one or more overflowing channels are arranged on the rotor, and the pulse jet flow frequency can be adjusted by setting the number of the overflowing channels.
4. A self-excited blocking type pulse jet generating method as claimed in claim 1, wherein: the utility model discloses a rotor, including casing, rotor, screw plug, rotor, casing follow side processing out the chamber that holds of installation rotor, the rotor is installed through the screw plug and is being held the intracavity, the rotor both ends are processed into conical surface or spacing axle, the inside and screw plug of casing correspond the part processing out can carry out limiting displacement's bell groove or draw-in groove to the rotor.
5. A self-excited blocking type pulse jet generating method as claimed in claim 1, wherein: the impeller groove is formed by processing a groove on the surface of the rotor or welding a raised blade on the surface of the rotor.
6. A self-excited blocking type pulse jet generating method as claimed in claim 1, wherein: the shape of the shell is any one of a cylinder, an elliptic cylinder, a polygonal cylinder, a cuboid and a square.
7. A self-excited blocking type pulse jet generating method as set forth in claim 6, wherein: the casing shape is cylindrical, the second injection channel is eccentrically arranged at the end part of the cylinder and corresponds to the cylindrical section of the rotor, and the first injection channel is eccentrically arranged relative to the axis of the rotor and corresponds to the impeller groove section of the rotor.
8. A self-excited blocking type pulse jet generating method as set forth in claim 4, wherein: and a sealing ring is arranged on the end surface of the plug and the shell which are connected with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910040905.4A CN109701761B (en) | 2019-01-16 | 2019-01-16 | Self-excitation blocking type pulse jet flow generation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910040905.4A CN109701761B (en) | 2019-01-16 | 2019-01-16 | Self-excitation blocking type pulse jet flow generation method |
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| Publication Number | Publication Date |
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| CN109701761A CN109701761A (en) | 2019-05-03 |
| CN109701761B true CN109701761B (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910040905.4A Expired - Fee Related CN109701761B (en) | 2019-01-16 | 2019-01-16 | Self-excitation blocking type pulse jet flow generation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114618699B (en) * | 2022-03-29 | 2023-01-06 | 合肥工业大学 | Pulse gas jet device based on porous rotating disk with different axes of flow channel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU784933A1 (en) * | 1979-01-15 | 1980-12-07 | Ярославский политехнический институт | Centrifugal-jet injection nozzle |
| CN2467193Y (en) * | 2001-03-09 | 2001-12-26 | 牛子久 | Drill column inner pulse liquid flow generator |
| CN100435976C (en) * | 2006-07-03 | 2008-11-26 | 浙江工业大学 | Blade pulsation generator |
| US10166556B2 (en) * | 2012-08-07 | 2019-01-01 | Vac-Tron Equipment, Llc | Pulsating high pressure air and water nozzle |
| GB201410651D0 (en) * | 2014-06-14 | 2014-07-30 | Wilkinson Mark | Anti shock fire nozzle |
| CN205164994U (en) * | 2015-10-22 | 2016-04-20 | 中国石油大学(华东) | Blade rotation type pulse jet generator |
| CN205164995U (en) * | 2015-10-22 | 2016-04-20 | 中国石油大学(华东) | Self -powered mechanical type pulse jet generator |
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- 2019-01-16 CN CN201910040905.4A patent/CN109701761B/en not_active Expired - Fee Related
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| CN109701761A (en) | 2019-05-03 |
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