A self-spinning nozzle ejector and use method thereof

Abstract

The present invention belongs to the field of ejectors, and specifically relates to a spinning nozzle ejector and a method of use, wherein the spinning nozzle ejector includes a suction chamber and a spinning nozzle; the suction chamber includes an end plate and an annular side plate; an active flow inner channel with a curved and gradually expanding structure is provided in the spinning nozzle, the small-diameter inlet end of the active flow inner channel is connected to the end plate, and the large-diameter outlet end is located in the suction chamber; a passive flow inlet channel is provided on the inner wall of the annular side plate between the end plate and the large-diameter outlet end. The spinning nozzle ejector provided by the present invention realizes efficient suction of the passive flow while accelerating and rotating the active flow through the arrangement of the positional relationship between the spinning nozzle and the passive flow inlet channel and the spinning nozzle, and the speed difference between the active flow and the passive flow is large, and the active flow is a rotating supersonic airflow, which can greatly improve the mixing efficiency and mixing effect of the active flow and the passive flow.

Description

Technical Field

[0001] The invention belongs to the field of ejectors, and in particular relates to a self-spinning nozzle ejector and a use method thereof. Background Art

[0002] The gas ejector is a gas powered device that does not contain any moving parts. Its principle is to use the viscous shear force and convection of the gas to transfer kinetic energy from the high-energy gas to the passive ejector gas, thereby increasing the pressure of the ejected gas flow. The ejector is widely used in refrigeration systems and high-altitude simulation platforms due to its advantages such as large boost ratio, wide load matching range, fast control response, and good self-stabilization performance under variable working conditions.

[0003] Chinese invention patent application CN115779714A discloses a multi-nozzle ejector mixer, which proposes a spiral nozzle method. The rotating nozzle is the mainstream air source inlet, which is used for the active flow to form a swirl effect in the mixing chamber to improve the mixing efficiency. The tangential air inlet is the secondary flow inlet, which is arranged on the wall of the suction pipe. However, this solution has limited improvement in mixing efficiency due to the small contact area between the active flow and the passive flow. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a self-spinning nozzle ejector with simple structure and high active flow and passive flow mixing efficiency and a use method thereof.

[0005] The present invention provides a self-spinning nozzle ejector, comprising a suction chamber and at least one self-spinning nozzle;

[0006] The suction chamber comprises an end plate and an annular side plate arranged outside the end plate;

[0007] The spin nozzle is provided with an active flow inner channel with a curved and gradually expanding structure, the small-diameter inlet end of the active flow inner channel is connected to the end plate, and the large-diameter outlet end is located in the suction chamber, and the axis of the spin nozzle is a spiral structure;

[0008] The annular side plate is provided with a passive flow inlet channel on the inner wall between the end plate and the large-diameter outlet end, and a passive flow outlet is formed between the annular side plate and the large-diameter outlet end.

[0009] Furthermore, the outer wall of the spinning nozzle is a curved and gradually expanding structure.

[0010] Furthermore, the number of the spinning nozzles is 3-6.

[0011] Furthermore, the plurality of spinning nozzles are arranged in a circular array along the axis of the suction chamber.

[0012] Furthermore, the spin nozzle further comprises an inlet section and a tapered section which are arranged in sequence, and the small-caliber inlet end of the active flow inner channel is connected to the small-caliber outlet end of the tapered section;

[0013] The inlet section is disposed through the end plate.

[0014] Furthermore, the passive flow inlet channel is an annular channel;

[0015] An annular through groove through which the suction chamber passes is arranged inside the annular channel.

[0016] Furthermore, at least two passive flow air inlets arranged in a circular array are provided on the side wall of the annular channel.

[0017] Furthermore, the groove width of the annular through groove is smaller than the channel width on the corresponding two sides of the annular channel.

[0018] Furthermore, the self-spinning nozzle ejector further comprises a mixing chamber, a roaring channel and a diffusion section which are arranged in sequence;

[0019] The inlet end of the mixing chamber is in communication with an end of the suction chamber facing away from the end plate.

[0020] The present invention also provides a method for using the above-mentioned self-spinning nozzle ejector, comprising the following steps: a supersonic active flow flows from an active flow inner channel into a suction chamber, and when flowing from a small-diameter inlet end to a large-diameter outlet end, its gradually expanding structure accelerates the active flow, and its curved structure causes the active flow to rotate to form a supersonic rotating airflow, and the supersonic rotating airflow rotates and flows toward the downstream of the suction chamber and generates negative pressure on the upstream of the passive flow outlet;

[0021] The passive flow flows from the passive flow inlet channel into the upstream of the suction chamber, and is attracted by negative pressure to flow out to the passive flow outlet, and the passive flow flowing out from the passive flow outlet is mixed with the supersonic rotating airflow.

[0022] The beneficial effect of the present invention is that the spinning nozzle ejector provided by the present invention realizes efficient suction of the passive flow while accelerating and rotating the active flow through the arrangement of the positional relationship between the spinning nozzle and the passive flow inlet channel and the spinning nozzle, and the speed difference between the active flow and the passive flow is large. The active flow is a rotating supersonic airflow, which can greatly improve the mixing efficiency and mixing effect of the active flow and the passive flow, and the active flow near the large-diameter outlet end will diffuse toward the outside of the large-diameter outlet end, and this part of the airflow will penetrate toward the passive flow, further improving the mixing effect. In addition, the large-diameter outlet end of the spinning nozzle can increase the flow area of ​​the active flow and reduce the area of ​​the passive flow outlet, thereby reducing the flow area of ​​the passive flow, thereby improving the mixing effect of the active flow in the form of a rotating supersonic airflow on the passive flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 It is a structural schematic diagram of the present invention;

[0024] Attached Figure 2 It is a left side view of the present invention;

[0025] Attached Figure 3 For attachment Figure 2 Middle AA section view;

[0026] Attached Figure 4 It is a front view of the present invention;

[0027] Attached Figure 5 For attachment Figure 2 Middle BB section view;

[0028] Attached Figure 6 For attachment Figure 5 A three-dimensional schematic diagram of

[0029] Attached Figure 7 It is a schematic diagram of the installation of the self-spinning nozzle in the present invention;

[0030] Attached Figure 8 Schematic diagram of active flow in the active flow inner channel of the present invention.

[0031] In the figure, 1-suction chamber; 11-end plate; 12-annular side plate; 2-spinning nozzle; 21-active flow inner channel; 211-small-diameter inlet end; 212-large-diameter outlet end; 22-tapered section; 221-small-diameter outlet end; 222-large-diameter inlet end; 23-inlet section; 3-passive flow inlet channel; 31-annular groove; 32-passive flow inlet; 4-passive flow outlet; 5-mixing chamber; 6-roar; 7-diffuser section. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] As attached Figure 1 -Attached Figure 8 As shown, the present invention provides a spinning nozzle ejector, comprising a suction chamber 1 and at least one spinning nozzle 2;

[0038] The suction chamber 1 comprises an end plate 11 and an annular side plate 12 arranged outside the end plate 11, wherein the annular side plate 12 is preferably cylindrical, and may also be rectangular or other polyhedral structures.

[0039] The spin nozzle 2 is provided with an active flow inner channel 21 with a curved and gradually expanding structure, wherein the curved and gradually expanding structure is based on the gradually expanding structure, and its axis is a spiral structure, for example, the axis is a curve or a spiral line, so that the gradually expanding structure can accelerate the supersonic active flow, and the axis bending structure can make the active flow passing through the active flow inner channel 21 rotate during the flow process, at this time, the part of the supersonic rotating active flow close to the large-diameter outlet end 212 will also diffuse to the outside of the large-diameter outlet end 212, and this part of the airflow will penetrate toward the passive flow, the small-diameter inlet end 211 of the active flow inner channel 21 is connected to the end plate 11, thereby realizing the main flow supply device outside the end plate 11 is connected to the small-diameter inlet end 211, and the large-diameter outlet end 212 is located in the suction chamber 1, and the axis of the spin nozzle 2 is a spiral structure, and the spin nozzle 2 is used to provide a supersonic rotating active flow in the suction chamber 1;

[0040] The annular side plate 12 is provided with a passive flow inlet channel 3 on the inner wall between the end plate 11 and the large-diameter outlet end 212. The passive flow inlet channel 3 is used to provide a passive flow to be sucked into the suction chamber 1. A passive flow outlet 4 is formed between the annular side plate 12 and the large-diameter outlet end 212. The passive flow flows into the suction chamber 1 through the passive flow inlet channel 3, and then is affected by the negative pressure effect of the active flow on the suction chamber 1. The passive flow in the suction chamber 1 is sucked by the negative pressure to the passive flow outlet 4 and flows out.

[0041] The spinning nozzle ejector provided by the present invention realizes efficient suction of the passive flow while accelerating and rotating the active flow through the arrangement of the spinning nozzle 2 and the passive flow inlet channel 3 and the spinning nozzle 2, and the speed difference between the active flow and the passive flow is large. The active flow is a rotating supersonic airflow, which can greatly improve the mixing efficiency and mixing effect of the active flow and the passive flow. Moreover, the active flow near the large-diameter outlet end 212 will diffuse toward the outside of the large-diameter outlet end 212, and this part of the airflow will penetrate toward the passive flow, further improving the mixing effect. In addition, the large-diameter outlet end 212 of the spinning nozzle 2 can increase the flow area of ​​the active flow and reduce the area of ​​the passive flow outlet 4, thereby reducing the flow area of ​​the passive flow, thereby improving the mixing effect of the active flow in the form of a rotating supersonic airflow on the passive flow.

[0042] In one embodiment, the outer wall of the self-spinning nozzle 2 is a curved and gradually expanding structure. On the one hand, the passive flow will produce a rotational guide to the passive flow in the process of passing through the outer wall of the self-spinning nozzle 2, and finally make the passive flow sucked out from the passive flow outlet 4 in a rotating state. At this time, as long as the rotation states of the passive flow and the active flow are inconsistent, the mixing effect of the active flow and the passive flow can be improved. Preferably, the rotational guide direction of the passive flow by the outer wall of the self-spinning nozzle 2 is opposite to the rotational guide direction of the active flow by the active flow inner channel 21, further improving the mixing effect of the active flow and the passive flow. On the other hand, the outer wall of the self-spinning nozzle 2 also makes this part of the suction chamber 1 form a structure with a large area close to the end plate 11 and a gradually decreasing area toward the outlet direction of the passive flow outlet 4. After the passive flow enters the suction chamber 1 through the passive flow inlet channel 3, the area of ​​the flow path of the passive flow gradually decreases during the process of the passive flow passing through the suction chamber 1, which can ensure that the passive flow at the passive flow outlet 4 is uniform. Finally, the outer wall of the spinning nozzle 2 and the active flow inner channel 21 are both curved and gradually expanding structures, which can ensure the wall thickness of the spinning nozzle 2 and avoid occupying too much space in the suction chamber 1.

[0043] In one embodiment, 3-6 spinning nozzles 2 are provided, and preferably, 4 spinning nozzles 2 are arranged. By providing multiple spinning nozzles 2, multiple rotating supersonic active flows can be provided, and the passive flow is also divided into multiple blocks, so that the contact area between the active flow and the passive flow can be greatly increased, and the mixing efficiency can be further improved.

[0044] In one of the embodiments, the plurality of spinning nozzles 2 are arranged in a circular array along the axis of the suction chamber 1. In this embodiment, the active flow and the passive flow can be evenly distributed, thereby improving the mixing uniformity of the active flow and the passive flow.

[0045] In one embodiment, the spin nozzle 2 further includes an inlet section 23 and a tapered section 22 which are arranged in sequence, wherein the inlet section 23 is used to connect to an external active flow air supply device, and the tapered section 22 is used to accelerate the active flow to supersonic speed, and one end of the tapered section 22 connected to the small-diameter inlet end 211 of the active flow inner channel 21 is a small-diameter outlet end 221, and one end of the tapered section 22 connected to the inlet section 23 is a large-diameter inlet end 222, and the small-diameter inlet end 211 of the active flow inner channel 21 is connected to the small-diameter outlet end 221 of the tapered section 22, so that the active flow located at the small-diameter inlet end 211 is a supersonic airflow, and at this time, the active flow inner channel 21 of the gradually expanding structure can further accelerate the active flow;

[0046] The inlet section 23 is disposed through the end plate 11 , so as to facilitate its connection to an external active flow air supply device.

[0047] In one embodiment, the passive flow inlet channel 3 is an annular channel;

[0048] An annular through groove 31 penetrating the suction chamber 1 is arranged inside the annular channel. Such arrangement can improve the uniformity of the passive flow in the suction chamber 1 .

[0049] In one embodiment, at least two passive flow air inlets 32 arranged in a circular array are provided on the side wall of the annular channel, and an external passive flow air supply device is connected to the passive flow air inlet 32, which simplifies the difficulty of the passive flow air supply device in uniformly transporting gas into the annular channel.

[0050] In one of the embodiments, the groove width of the annular groove 31 is smaller than the channel width on both sides of the corresponding annular channel. At this time, the annular channel will form an air collecting chamber, and the passive flow will enter the annular channel from the passive flow inlet 32, and the passive flow in the annular channel will flow from the annular groove 31 to the suction chamber 1. During the whole process, the passive flow will fill the annular channel, so that the passive flow can flow evenly in each position of the annular groove 31, further improving the uniformity of the passive flow in the suction chamber 1.

[0051] In one embodiment, the spinning nozzle ejector further comprises a mixing chamber 5, a roaring channel 6 and a diffusion section 7 which are arranged in sequence;

[0052] The inlet end of the mixing chamber 5 is connected to the end of the suction chamber 1 away from the end plate 11. The mixing chamber 5 is used to fully mix the active flow and the passive flow. The roar 6 can limit the mixed flow, ensure the appropriate flow rate and form a stable airflow. The diffusion section 7 is used to discharge the mixed flow to the external environment.

[0053] The present invention also provides a method for using a spinning nozzle ejector, comprising the following steps: a supersonic active flow flows from an active flow inner channel 21 into a suction chamber 1, and when flowing from a small-diameter inlet end 211 to a large-diameter outlet end 212, its gradually expanding structure accelerates the active flow, and its curved structure causes the active flow to rotate, forming a supersonic rotating airflow, and the supersonic rotating airflow rotates and flows toward the downstream of the suction chamber 1, and generates negative pressure on the upstream of the passive flow outlet 4;

[0054] The passive flow flows into the upstream of the suction chamber 1 from the passive flow inlet channel 3 and is attracted by negative pressure to flow out to the passive flow outlet 4 . The passive flow flowing out from the passive flow outlet 4 is mixed with the supersonic rotating airflow.

[0055] In the embodiment where the outer wall of the spinning nozzle 2 has a curved and gradually expanding structure, during the process of the passive flow being attracted from the upstream negative pressure of the suction chamber 1 to the passive flow outlet 4, the outer wall of the spinning nozzle 2 will guide the passive flow to rotate, thereby making the passive flow also a rotating airflow, further improving the mixing effect of the active flow and the passive flow.

[0056] The above is only an embodiment and does not limit the present invention in any way. Any person skilled in the art can use the above disclosed technical contents to make many possible changes, modifications or modifications to the technical solutions of the present invention into equivalent embodiments of equivalent changes without departing from the scope of the technical solutions of the present invention. Therefore, any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.

Claims

1. A self-spinning nozzle ejector, characterized in that: It comprises a suction chamber (1) and at least one spinning nozzle (2); The suction chamber (1) comprises an end plate (11) and an annular side plate (12) arranged outside the end plate (11); An active flow channel (21) having a curved and gradually expanding structure is provided in the self-spinning nozzle (2); a small-diameter inlet end (211) of the active flow channel (21) is connected to the end plate (11); a large-diameter outlet end (212) is located in the suction chamber (1); and the axis of the self-spinning nozzle (2) has a spiral structure; The annular side plate (12) is provided with a passive flow inlet channel (3) on the inner wall between the end plate (11) and the large-diameter outlet end (212), and a passive flow outlet (4) is formed between the annular side plate (12) and the large-diameter outlet end (212); The outer wall of the spinning nozzle (2) is in a curved and gradually expanding structure, which can generate rotational guidance for the passive flow, causing the rotational states of the passive flow and the active flow to be inconsistent.

2. The self-spinning nozzle ejector according to claim 1, characterized in that: The number of the self-spinning nozzles (2) is 3 to 6.

3. The self-spinning nozzle ejector according to claim 2, characterized in that: The plurality of spinning nozzles (2) are arranged in a circular array along the axis of the suction chamber (1).

4. The self-spinning nozzle ejector according to claim 1, characterized in that: The spinning nozzle (2) further comprises an inlet section (23) and a tapered section (22) which are arranged in sequence, and the small-caliber inlet end (211) of the active flow inner channel (21) is connected to the small-caliber outlet end (221) of the tapered section (22); The inlet section (23) is arranged to penetrate the end plate (11).

5. The self-spinning nozzle ejector according to any one of claims 1 to 4, characterized in that: The passive flow inlet channel (3) is an annular channel; An annular through groove (31) communicating with the suction chamber (1) is provided inside the annular channel.

6. The self-spinning nozzle ejector according to claim 5, characterized in that: At least two passive flow air inlets (32) arranged in an annular array are provided on the side wall of the annular channel.

7. The self-spinning nozzle ejector according to claim 6, characterized in that: The groove width of the annular through groove (31) is smaller than the channel widths of the corresponding two sides of the annular channel.

8. The self-spinning nozzle ejector according to any one of claims 1 to 4, 6 and 7, characterized in that: It also includes a mixing chamber (5), a roaring passage (6) and a diffusion section (7) which are arranged in sequence; The inlet end of the mixing chamber (5) is in communication with an end of the suction chamber (1) facing away from the end plate (11).

9. A method for using the spinning nozzle ejector according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: a supersonic active flow flows from an active flow inner channel (21) into a suction chamber (1); when the active flow flows from a small-diameter inlet end (211) to a large-diameter outlet end (212), the gradually expanding structure accelerates the active flow, and the curved structure causes the active flow to rotate, thereby forming a supersonic rotating airflow; the supersonic rotating airflow rotates and flows downstream of the suction chamber (1), and generates negative pressure upstream of the passive flow outlet (4); The passive flow flows from the passive flow inlet channel (3) into the upstream of the suction chamber (1), and is attracted by negative pressure to flow out from the passive flow outlet (4), and the passive flow flowing out from the passive flow outlet (4) is mixed with the supersonic rotating airflow.

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