Air sand mixing device and sand and dust separation performance test system

Abstract

The present invention relates to the field of aeroengine test technology, and discloses an air-sand mixing device and a sand-dust separation performance test system. The air-sand mixing device includes: a pressure tank, which forms a cavity inside; an air charging component, which is arranged on the pressure tank and communicated with the cavity; an exhaust pipe, which is arranged on the pressure tank and communicated with the cavity; a sand throwing component, which is arranged in the cavity, and the sand throwing port of the sand throwing component is arranged toward the inlet end of the exhaust pipe; a mixing pipe, which is communicated with the outlet end of the exhaust pipe, the pressure in the mixing pipe is lower than the pressure in the cavity, the mixing pipe is suitable for circulating high-temperature air, and the outlet end of the mixing pipe is suitable for communicating with a particle separator. The present invention uses the air charging component to inflate the pressure tank to establish a stable pressure environment. The air in the pressure tank carries the sand and dust thrown by the sand throwing component to the mixing pipe, and mixes with the high-temperature air in the mixing pipe, thereby forming high-temperature and high-pressure sand-containing air that meets the experimental requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of aeroengine testing, and in particular to an air sand mixing device and a sand and dust separation performance testing system. Background Art

[0002] Particle separators are crucial devices for removing sand and dust from gas turbine engine inlet air and other airborne sources. Sand and dust separation performance testing is required to ensure proper performance. Particle separators are exposed to high-temperature, high-pressure, enclosed environments within the engine for extended periods of time. During these tests, the high-pressure, clean inlet air in the enclosed piping must not only be heated but also mixed with sand and dust that meets specified specifications.

[0003] However, existing sand-doping devices usually dope air with sand under normal pressure and natural environment, and are unable to dope high-temperature and high-pressure gas with sand in a closed pipeline. Summary of the Invention

[0004] In view of this, the present invention provides an air sand mixing device and a sand and dust separation performance test system to solve the problem of sand mixing with high-temperature and high-pressure gas.

[0005] In the first aspect, the present invention provides an air-sand mixing device, comprising: a pressure tank, which forms a cavity inside; an inflation component, which is arranged on the pressure tank and connected to the cavity; an exhaust pipe, which is arranged on the pressure tank and connected to the cavity; a sand throwing component, which is arranged in the cavity, and the sand throwing port of the sand throwing component is arranged toward the inlet end of the exhaust pipe; a mixing pipe, which is connected to the outlet end of the exhaust pipe, the pressure in the mixing pipe is lower than the pressure in the cavity, the mixing pipe is suitable for circulating high-temperature air, and the outlet end of the mixing pipe is suitable for connecting to a particle separator.

[0006] Beneficial effect: The inflation component is used to inflate the pressure tank to establish a stable pressure environment. The air in the pressure tank carries the sand and dust released by the sand-feeding component to the mixing pipe and mixes with the high-temperature air in the mixing pipe, thereby forming high-temperature and high-pressure sand-containing air that meets the experimental requirements.

[0007] In an optional embodiment, the inflation component includes an inflation tube and an air diffuser, the inflation tube is connected to the air diffuser, and the air diffuser is disposed in the cavity.

[0008] Beneficial effect: By setting up an air diffuser, the air in the inflation pipe is evenly diverted to the surroundings of the pressure tank, which can form a balanced and stable pressure environment in the pressure tank, ensure that a uniform air flow field is formed at the inlet end of the exhaust pipe, and prevent sand and dust from clogging the pipe.

[0009] In an optional embodiment, the inflation component further includes a one-way valve, and the one-way valve is arranged on the inflation tube.

[0010] Beneficial effect: By setting a one-way valve, it can prevent the pressure in the pressure tank from being too high and causing air backflow, and prevent sand-containing air from backflowing into the inflation pipe.

[0011] In an optional embodiment, the inlet end of the exhaust pipe is vertically arranged in the pressure tank, and the height of the inlet end of the exhaust pipe is higher than the height of the outlet end of the inflation component.

[0012] Beneficial effects: The inlet end of the exhaust pipe is arranged in the pressure tank in a vertical direction to prevent sand and dust from accumulating at the inlet end of the exhaust pipe; the height of the inlet end of the exhaust pipe is higher than the height of the outlet end of the inflation component, which can avoid dead corners at the bottom of the pressure tank, thereby maximizing the use of the volume of the gas storage tank, improving gas storage efficiency, ensuring that the gas is evenly distributed in the tank, and ensuring balanced pressure in the pressure tank.

[0013] In an optional embodiment, the exhaust pipe is bent, and the outlet end of the exhaust pipe is arranged along the axial direction of the mixing pipe.

[0014] Beneficial effect: The outlet end of the exhaust pipe is arranged along the axial direction of the mixing pipe, which facilitates the mixing of the sand-containing air in the exhaust pipe with the air in the mixing pipe.

[0015] In an optional embodiment, the inner diameter of the outlet end of the mixing tube is gradually reduced along the air circulation direction.

[0016] Beneficial effect: The inner diameter of the outlet end of the mixing tube is gradually reduced, that is, the flow cross-sectional area of ​​the outlet end of the mixing tube gradually becomes smaller, and the air flow gradually accelerates, which is beneficial to the outflow of air from the outlet end of the mixing tube and the mixing of the high-temperature air in the mixing tube and the sand-containing air in the exhaust pipe.

[0017] In an optional embodiment, the inner diameter of the inlet end of the exhaust pipe is gradually reduced along the air circulation direction.

[0018] Beneficial effect: The inner diameter of the inlet end of the exhaust pipe is gradually reduced, that is, the flow cross-sectional area of ​​the inlet end of the exhaust pipe gradually becomes smaller, which facilitates the formation of air flow from slow to fast and prevents sand and dust from accumulating and remaining in the inlet end of the exhaust pipe.

[0019] In an optional embodiment, the pressure tank includes a tank body, a maintenance cover and a sand filling pipe. The maintenance cover can be opened and closed on the tank body. The sand filling pipe is set on the maintenance cover. The outlet end of the sand filling pipe is set corresponding to the inlet end of the sand injection assembly.

[0020] In a second aspect, the present invention further provides a sand and dust separation performance test system, comprising the above-mentioned air sand mixing device; a particle separator connected to the air sand mixing device; and an air source connected to the air sand mixing device.

[0021] In an optional embodiment, an air channel is formed between the air source and the air sand mixing device, and the sand and dust separation performance test system further includes a control valve group, which is connected to the air channel.

[0022] Beneficial effect: By designing a control valve group, the gas composition in the exhaust pipe and the mixing pipe can be controlled by the control valve group, thereby forming sand-containing air with different sand content conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of an air sand mixing device according to an embodiment of the present invention;

[0025] Figure 2 Schematic diagram of a sand and dust separation performance test system according to an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 10. Pressure tank; 11. Tank body; 12. Maintenance cover; 13. Sand filling pipe; 14. Bracket; 15. Pressure probe; 20. Inflating assembly; 21. Inflating pipe; 22. Air diffuser; 23. One-way valve; 30. Exhaust pipe; 40. Sand feeding assembly; 41. Sand feeding port; 50. Mixing pipe; 60. Particle separator; 70. Air source; 80. Control valve group; 81. Main regulating valve; 82. First sub-regulating valve; 83. Second sub-regulating valve; 84. Stop valve; 90. Flow meter; 100. Heater; 110. Main pipeline; 120. First sub-pipeline; 130. Second sub-pipeline. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0029] The following combination Figures 1 to 2 , describing embodiments of the present invention.

[0030] According to an embodiment of the present invention, in a first aspect, an air-sand mixing device is provided, comprising a pressure tank 10, an air charging assembly 20, an exhaust pipe 30, a sand injection assembly 40, and a mixing pipe 50. The pressure tank 10 forms a cavity inside; the air charging assembly 20 is disposed on the pressure tank 10 and communicates with the cavity; the exhaust pipe 30 is disposed on the pressure tank 10 and communicates with the cavity; the sand injection assembly 40 is disposed in the cavity, with the sand injection port 41 of the sand injection assembly 40 disposed toward the inlet end of the exhaust pipe 30; the mixing pipe 50 is communicated with the outlet end of the exhaust pipe 30, the pressure in the mixing pipe 50 is lower than the pressure in the cavity, the mixing pipe 50 is suitable for circulating high-temperature air, and the outlet end of the mixing pipe 50 is suitable for communicating with a particle separator 60.

[0031] The air-sand mixing device of this embodiment is used to use the inflation component 20 to inflate the pressure tank 10 to establish a stable pressure environment. The air in the pressure tank 10 carries the sand and dust released by the sand-feeding component 40 and flows to the mixing pipe 50, and is mixed with the high-temperature air in the mixing pipe 50, thereby forming high-temperature and high-pressure sand-containing air that meets the experimental requirements.

[0032] For details, please refer to Figure 1 The sand throwing port 41 of the sand throwing assembly 40 extends into the inlet end of the exhaust pipe 30 , thereby preventing sand and dust from entering the cavity of the pressure tank 10 .

[0033] For details, please refer to Figure 1 A frame is provided in the pressure tank 10, and the sand throwing assembly 40 is provided on the frame.

[0034] In one embodiment, Figure 1 As shown, the inflation assembly 20 includes an inflation tube 21 and an air diffuser 22. The inflation tube 21 is connected to the air diffuser 22, and the air diffuser 22 is disposed within the cavity. By providing the air diffuser 22, the air in the inflation tube 21 is evenly distributed around the pressure tank 10, forming a balanced and stable pressure environment within the pressure tank 10, ensuring a uniform inlet air flow field at the inlet end of the exhaust pipe 30, and preventing sand and dust from clogging the pipe.

[0035] Specifically, the air diffuser 22 is in the form of a porous plate.

[0036] Of course, in other alternative embodiments, the air diffuser 22 may also be in other forms, such as a porous tube.

[0037] It should be noted that the air diffuser 22 can ensure uniform air flow to prevent air turbulence from forming in the sealed pressure tank 10 .

[0038] In one embodiment, Figure 1 As shown, the inflation assembly 20 further includes a one-way valve 23, which is provided on the inflation pipe 21. By providing the one-way valve 23, the pressure in the pressure tank 10 is prevented from being too high to cause air backflow, and the sand-containing air is prevented from backflowing into the inflation pipe 21.

[0039] It should be noted that when inflation is stopped or the inflation pressure is adjusted, the pressure in the pressure tank 10 is higher than the pressure in the inflation pipe 21 , and the sand-containing air in the pressure tank 10 may flow back into the inflation pipe 21 , causing contamination of the inflation pipe 21 .

[0040] In one embodiment, Figure 1 As shown, the inlet end of the exhaust pipe 30 is vertically disposed within the pressure tank 10, and the height of the inlet end of the exhaust pipe 30 is higher than the height of the outlet end of the inflatable assembly 20. The inlet end of the exhaust pipe 30 is vertically disposed within the pressure tank 10 to prevent sand and dust from accumulating at the inlet end of the exhaust pipe 30. The inlet end of the exhaust pipe 30 is higher than the height of the outlet end of the inflatable assembly 20, which avoids dead space at the bottom of the pressure tank 10, thereby maximizing the capacity of the gas storage tank, improving gas storage efficiency, ensuring uniform distribution of gas within the tank, and ensuring pressure balance within the pressure tank 10.

[0041] It should be noted that in other alternative embodiments, the inlet end of the exhaust pipe 30 can also be set at other angles, but sand and dust are more likely to adhere to the pipe wall when moving in the exhaust pipe 30. Therefore, it is preferred that the inlet end of the exhaust pipe 30 is set in the pressure tank 10 in a vertical direction.

[0042] It should be noted that in other alternative embodiments, the height of the inlet end of the exhaust pipe 30 can also be lower than the height of the outlet end of the inflatable assembly 20. However, in this embodiment, air may flow directly out of the exhaust pipe 30 after entering the pressure tank 10 from the inflatable assembly 20, thereby causing the overall pressure in the pressure tank 10 to be unstable. Therefore, it is preferred that the height of the inlet end of the exhaust pipe 30 be higher than the height of the outlet end of the inflatable assembly 20.

[0043] In one embodiment, Figure 1As shown, the exhaust pipe 30 is bent, and the outlet end of the exhaust pipe 30 is arranged along the axial direction of the mixing pipe 50. The outlet end of the exhaust pipe 30 is arranged along the axial direction of the mixing pipe 50 to facilitate mixing of the sand-containing air in the exhaust pipe 30 with the air in the mixing pipe 50.

[0044] For details, please refer to Figure 1 The exhaust pipe 30 is an L-shaped pipe body, and the outlet end of the exhaust pipe 30 is perpendicular to the inlet end of the exhaust pipe 30.

[0045] Of course, in other alternative embodiments, the outlet end of the exhaust pipe 30 may also be oriented at an angle to the axial direction of the mixing pipe 50 . However, in this angled arrangement, the mixing effect of the sand-laden air and the high-temperature air is poorer than that in the present embodiment. Therefore, it is preferred that the outlet end of the exhaust pipe 30 be oriented along the axial direction of the mixing pipe 50 .

[0046] In one embodiment, Figure 1 As shown, the inner diameter of the outlet end of the mixing tube 50 gradually decreases along the air flow direction. This gradually decreases the inner diameter of the outlet end of the mixing tube 50, that is, the flow cross-sectional area at the outlet end of the mixing tube 50 gradually decreases, and the air flow gradually accelerates. This not only facilitates the outflow of air from the outlet end of the mixing tube 50, but also facilitates the mixing of the high-temperature air in the mixing tube 50 with the sand-laden air in the exhaust pipe 30.

[0047] Specifically, the inner diameter of the outlet end of the mixing tube 50 gradually decreases and is set in a trumpet shape. The air gradually accelerates when flowing through the outlet end of the mixing tube 50. The high flow rate of air helps to reduce the unevenness of air flow and increase the heat transfer coefficient, so that the high-temperature air in the mixing tube 50 is mixed with the sand-containing air in the exhaust pipe 30.

[0048] In one embodiment, Figure 1 As shown, the inner diameter of the inlet end of the exhaust pipe 30 gradually decreases along the air flow direction. The gradually decreasing inner diameter of the inlet end of the exhaust pipe 30, that is, the flow cross-sectional area of ​​the inlet end of the exhaust pipe 30 gradually decreases, facilitates the formation of air flow from slow to fast, and prevents sand and dust from accumulating and remaining in the inlet end of the exhaust pipe 30.

[0049] Specifically, the inner diameter of the inlet end of the exhaust pipe 30 gradually decreases and is arranged in a trumpet shape.

[0050] It is understandable that when the sand and dust falls onto the inlet end of the trumpet-shaped exhaust pipe 30 , it will also slide downward along the inner wall of the inlet end, thereby avoiding the accumulation of sand and dust.

[0051] In one embodiment, Figure 1As shown, the pressure tank 10 includes a tank body 11, a maintenance cover 12 and a sand filling pipe 13. The maintenance cover 12 can be opened and closed on the tank body 11. The sand filling pipe 13 is set on the maintenance cover 12. The outlet end of the sand filling pipe 13 is set corresponding to the inlet end of the sand throwing assembly 40.

[0052] It should be noted that the maintenance cover 12 can be opened and closed on the tank body 11, and the maintenance cover 12 and the tank body 11 can be detachably arranged. In other alternative embodiments, one end of the maintenance cover 12 can also be hinged to the tank body 11, and the other end of the maintenance cover 12 is suitable for abutting and closing with the tank body 11.

[0053] Specifically, an opening valve is provided on the sand filling pipe 13 , and the filling of the sand and dust raw materials is controlled by the opening valve, thereby solving the problem of feeding the sand and dust raw materials outside the pressure tank 10 .

[0054] Specifically, a pressure probe 15 is further provided on the tank body 11 , and the pressure in the pressure tank 10 is monitored by the pressure probe 15 .

[0055] Specifically, the pressure tank 10 further includes a bracket 14 , which is disposed at the bottom of the tank body 11 to support the tank body 11 and leave space for placing the mixing pipe 50 , the inflation pipe 21 and the exhaust pipe 30 .

[0056] It should be noted that after the tank body 11 is elevated, the sand and dust in the sand throwing assembly 40 has higher gravitational potential energy, and the sand and dust have higher kinetic energy when thrown into the exhaust pipe 30, further preventing the sand and dust from accumulating and remaining in the exhaust pipe 30.

[0057] According to an embodiment of the present invention, in a second aspect, a sand and dust separation performance test system is further provided, comprising the above-mentioned air sand mixing device; a particle separator 60 connected to the air sand mixing device; and an air source 70 connected to the air sand mixing device.

[0058] In one embodiment, Figure 2 As shown, an air channel is formed between the air source 70 and the air-sand mixing device. The sand and dust separation performance test system also includes a control valve assembly 80, which is connected to the air channel. By designing the control valve assembly 80, the gas composition in the exhaust pipe 30 and the mixing pipe 50 can be controlled by the control valve assembly 80, thereby forming sand-laden air with different sand content conditions.

[0059] In one embodiment, Figure 2 As shown, the air channel includes a main pipeline 110, a first sub-pipeline 120 and a second sub-pipeline 130. The main pipeline 110 is connected to the first sub-pipeline 120 and the second sub-pipeline 130 respectively. The first sub-pipeline 120 is connected to the inflation component 20, and the second sub-pipeline 130 is connected to the mixing pipe 50.

[0060] In one embodiment, Figure 2 As shown, the control valve group 80 includes a main regulating valve 81, a first sub-regulating valve 82, a second sub-regulating valve 83 and a stop valve 84. The main regulating valve 81 and the stop valve 84 are arranged on the main pipeline 110, the main regulating valve 81 is arranged downstream of the stop valve 84, the first sub-regulating valve 82 is arranged on the first sub-pipeline 120, and the second sub-regulating valve 83 is arranged on the second sub-pipeline 130.

[0061] Specifically, the shut-off valve 84 can be used to control the air in the main pipeline 110 , and the main regulating valve 81 can be used to control the flow rate in the main pipeline 110 .

[0062] Furthermore, after the gas in the main pipeline 110 is diverted to the first sub-pipeline 120 and the second sub-pipeline 130, the flow rates of the first sub-pipeline 120 and the second sub-pipeline 130 are controlled by the first sub-regulating valve 82 and the second sub-regulating valve 83 respectively, thereby controlling the pressure in the pipeline.

[0063] In one embodiment, Figure 2 As shown, the sand and dust separation performance test system further includes a flow meter 90 and a heater 100 , and the flow meter 90 and the heater 100 are arranged on the second sub-pipeline 130 .

[0064] It should be noted that the flow meter 90 is disposed upstream of the heater 100 to ensure that the air flowing through the flow meter 90 is not high-temperature air.

[0065] Specifically, the air in the second sub-pipeline 130 is heated by the heater 100 to obtain high-temperature air, and the flow rate of the air flowing through the second sub-pipeline 130 is measured and monitored by the flow meter 90 .

[0066] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the present invention.

Claims

1. An air sand mixing device, characterized in that: include: A pressure tank (10) having a cavity formed therein; an inflation assembly (20), disposed on the pressure tank (10) and in communication with the cavity; an exhaust pipe (30) disposed on the pressure tank (10) and communicating with the cavity; A sand throwing assembly (40) is disposed in the cavity, and a sand throwing port (41) of the sand throwing assembly (40) is disposed toward the inlet end of the exhaust pipe (30); A mixing tube (50) is connected to the outlet end of the exhaust pipe (30), the pressure in the mixing tube (50) is lower than the pressure in the cavity, the mixing tube (50) is suitable for circulating high-temperature air, and the outlet end of the mixing tube (50) is suitable for communicating with a particle separator (60).

2. The air sand mixing device according to claim 1, characterized in that: The inflation component (20) comprises an inflation tube (21) and an air diffuser (22); the inflation tube (21) is in communication with the air diffuser (22); and the air diffuser (22) is disposed in the cavity.

3. The air sand mixing device according to claim 2, characterized in that: The inflation component (20) further comprises a one-way valve (23), and the one-way valve (23) is arranged on the inflation tube (21).

4. The air sand mixing device according to any one of claims 1 to 3, characterized in that: The inlet end of the exhaust pipe (30) is vertically arranged in the pressure tank (10), and the height of the inlet end of the exhaust pipe (30) is higher than the height of the outlet end of the inflation component (20).

5. The air sand mixing device according to any one of claims 1 to 3, characterized in that: The exhaust pipe (30) is bent, and the outlet end of the exhaust pipe (30) is arranged along the axial direction of the mixing pipe (50).

6. The air sand mixing device according to any one of claims 1 to 3, characterized in that: Along the air circulation direction, the inner diameter of the outlet end of the mixing tube (50) is gradually reduced.

7. The air sand mixing device according to any one of claims 1 to 3, characterized in that: Along the air circulation direction, the inner diameter of the inlet end of the exhaust pipe (30) is gradually reduced.

8. The air sand mixing device according to any one of claims 1 to 3, characterized in that: The pressure tank (10) comprises a tank body (11), a maintenance cover (12) and a sand filling pipe (13); the maintenance cover (12) is openably arranged on the tank body (11); the sand filling pipe (13) is arranged on the maintenance cover (12); and the outlet end of the sand filling pipe (13) is arranged corresponding to the inlet end of the sand injection assembly (40).

9. A sand and dust separation performance test system, characterized in that: include: The air sand mixing device according to any one of claims 1 to 8; a particle separator (60) in communication with the air sand mixing device; An air source (70) is connected to the air sand mixing device.

10. The sand and dust separation performance test system according to claim 9, characterized in that: An air channel is formed between the air source (70) and the air sand mixing device. The sand and dust separation performance test system further comprises a control valve group (80), and the control valve group (80) is connected to the air channel.

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