Impact driving type flow distribution adjusting device and method for aviation

Abstract

The invention belongs to the technical field of fluid control, and relates to an impact driving type flow distribution adjusting device and method for aviation, the device is arranged at a pipeline branch of a liquid pipe network branch system, fluid flows through a flow guide block, the flow guide block senses liquid impact force, the force is transmitted to an adjusting plate at an outlet through a connecting rod, and the adjusting plate is used for adjusting flow distribution. The adjusting plate moves to change the overflowing cross sections of the two outlets, continuous adjustment of different branch flow distribution proportions is achieved, and the higher the flow velocity of fluid is, the larger the stress of the flow guide block is, the adjusting plate is driven to move more to correspond to different outlet flow distribution conditions. According to the flow distribution adjusting device, the complexity of an adjusting system can be reduced, flow resistance caused by flow distribution adjusting can be reduced, energy consumption of a power source in a liquid system is further reduced, meanwhile, the number of adjusting parts can be reduced, the cost of the fluid adjusting device is reduced, the system reliability is improved, and the control lag and control fluctuation conditions are improved; and the system weight is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of fluid control, and relates to an impact-driven flow distribution regulating device and a regulating method for aviation. Background Art

[0002] In the field of aircraft fluid control, in order to achieve the optimal performance of the system with liquid as the working fluid, the flow distribution ratio of different branches needs to be adjusted according to the system flow at the pipeline branch. For the flow regulation requirements of fluid branches in closed pipeline systems, the current mainstream method is to set an electric flow control valve on the branch or at the branch position, arrange a flow detection device and a control device in the system, and the control device sends a corresponding opening instruction to the electric flow control valve based on the liquid flow signal fed back by the flow detection device. The electric flow control valve changes its opening to achieve flow distribution regulation of different branches. This method has the following disadvantages: when using a flow control valve for adjustment, each branch needs to be equipped with a separate control valve, which is not conducive to improving the system integration; the control valve uses throttling to adjust the flow, which brings about a large flow resistance loss, which is not conducive to aircraft weight reduction and increases the power consumption of the liquid power source; automatic adjustment requires each flow control valve to be equipped with an electric or hydraulic drive mechanism, and a set of parameter detection and control systems are set up, which increases the weight and complexity of the system, and there is a control lag problem. Specifically in the aviation field, for working conditions that require flow as the control input, due to the strict weight restrictions and strong electromagnetic interference of the airborne environment, flow sensors cannot be arranged on the aircraft, and pressure parameters can only be used under specific conditions to approximately replace flow parameters. This method is difficult to adapt to real working conditions. In order to further reduce the number of components and reduce weight while improving system reliability, technical innovation is needed. Summary of the invention

[0003] Purpose of the Invention

[0004] An impact-driven flow distribution and regulation device and regulation method for aviation are invented. In an aircraft fluid system with branches, pure mechanical structural components are used to replace electric flow control valves, equivalent flow detection devices and control devices used to adjust flow distribution, thereby reducing the number of components, improving system reliability, improving control lag, and reducing system weight.

[0005] Technical Solution

[0006] An impact-driven flow distribution and adjustment device for aviation is adopted, which comprises an inlet shell, a flow detection mechanism, a connecting rod, an elastic element, a flow adjustment mechanism, and an outlet shell; the flow detection mechanism is a guide block with an inclined arc surface, a guide rod is arranged along the incoming flow direction on the side of the guide block facing away from the incoming flow, a guide groove is opened on the boss inside the outlet shell facing the incoming flow direction, the guide rod extends into the guide groove, and can move telescopically along the incoming flow direction under the action of the guide groove, and the boss plays a limiting role in the incoming flow direction for the guide block; an ear piece is arranged on the side of the guide block away from the incoming flow, and is hinged to the side of the connecting rod close to the incoming flow; the side of the connecting rod away from the incoming flow is hinged to the flow adjustment mechanism; the flow adjustment mechanism is a plate-like structure parallel to the guide groove, comprising an adjustment plate and two openings, the outlet shell is provided with two outlets perpendicular to the incoming flow direction and arranged in parallel along the incoming flow direction, the side of the adjustment plate facing the outlet is in sliding contact with the two outlets, and is limited and guided by two limiting bosses on the inner side of the outlet shell, and can reciprocate along the line connecting the midpoints of the two outlets.

[0007] Furthermore, the elastic element is arranged at the bottom of the guide groove and is limited by the guide rod, so that the elastic element is always in a compressed state during the entire moving stroke.

[0008] Furthermore, the two openings on the regulating plate are special-shaped openings, and the overlapping parts of the openings and the outlets form an effective flow channel.

[0009] Furthermore, the cross section of the guide rod is the same as the cross section of the guide groove, and a small gap is maintained.

[0010] Furthermore, the movement direction of the flow regulating mechanism is perpendicular to the flow direction of the liquid at each outlet, so as to eliminate the impulse generated by the flow regulating mechanism during the flow of liquid, which affects the force balance of the elastic element and interferes with the flow distribution result.

[0011] When the incoming liquid flows through the flow detection mechanism, the surface of the guide block facing the incoming flow direction of the liquid is a concave arc, and the arc surface guides the liquid flow direction to bend at a large angle, thereby sensing the impulse of the liquid flow. When the liquid flows into the flow distribution and adjustment device at a specific flow rate, a force is generated on the beveled arc surface of the flow detection mechanism, and the flow detection mechanism is pushed to move in the incoming flow direction with a specific combined force. Under the guidance of the guide groove on the boss, the flow detection mechanism overcomes the elastic force of the elastic element and pushes the flow detection and adjustment mechanism to move in the incoming flow direction through the connecting rod; the surface of the flow detection mechanism facing the incoming flow direction and the inner surface of the inlet shell together constitute a liquid flow channel, guiding the liquid to change the flow force direction in the inlet shell and enter the outlet shell;

[0012] The distribution of different outlet flow regulation is determined by the area ratio required by the flow detection and regulation mechanism at a specific equilibrium position, and the flow cross-sectional area A is larger than the area required for throttling the minimum flow outlet to achieve lower regulation resistance.

[0013] When the flow detection mechanism moves along the incoming flow direction, the guide rod squeezes the liquid inside the guide groove through the gap between the guide rod and the guide groove, thereby achieving a damping effect and preventing the adjustment plate from swinging frequently near the equilibrium position.

[0014] An impact-driven flow distribution and adjustment method for aviation includes the following steps:

[0015] 1. The outlet is a square. The flow rates of the two outlets a and b are Qa and Qb respectively, and the total inlet flow rate is Q; the spring stiffness is k;

[0016] 2. The required flow distribution relationship between the two outlets a and b is described by the following formula:

[0017]

[0018] 3. The guide block is subjected to the impulse F1 at the inlet flow rate Q1. At this time, the outlet flow rate of a is Qa1, the outlet flow rate of b is Qb1, and when the inlet flow rate increases by a small increment δQ, the increase in lift is:

[0019]

[0020] The backward displacement of the adjustment plate is recorded as δx, which is expressed as follows:

[0021]

[0022] At this time, the length and width of the corresponding exit b that is not blocked by the exit is recorded as y, and the effective area changes of the two exits a and b are:

[0023] δA a =L a ·x (3)

[0024] δA b =-(L a -y)·x (4)

[0025] For the flow change, taking x as the independent variable for integral calculation, we have

[0026]

[0027] Combined with the known effective area A of outlets a and b when there is no flow in the example a0 and A b0 By combining the above equations (1) to (5), we can obtain y=f(x), and the shape of the special-shaped outlet can be determined.

[0028] The width of the outlet at any position is limited within the side length La of the outlet.

[0029] The beneficial effects of this application are:

[0030] The flow distribution and adjustment device of the present invention is arranged at the branch of the pipeline of the liquid pipe network branch system. The fluid flows through the guide block, and the guide block senses the liquid impulse and transmits the force to the adjustment plate at the outlet through the connecting rod. The adjustment plate moves to change the flow cross-section of the two outlets, so as to realize continuous adjustment of the flow distribution ratio of different branches. The greater the fluid flow rate, the greater the force on the guide block, which drives the adjustment plate to move more, corresponding to different outlet flow distribution conditions. The flow distribution and adjustment device can reduce the complexity of the adjustment system, reduce the flow resistance caused by the flow distribution adjustment, and thus reduce the energy consumption of the power source in the liquid system. At the same time, the device can reduce the number of adjustment components, reduce the cost of the fluid adjustment device, improve the system reliability, improve the control lag and control fluctuation, and reduce the system weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the flow distribution and regulation device of the present invention;

[0032] Figure 2 It is a front view of the inner cavity of the outlet housing of the present invention facing the outlet direction;

[0033] Figure 3 A schematic diagram of an opening on the adjustment plate of the present invention;

[0034] Figure 4 It is a schematic diagram of the cooperation between the opening and the outlet of the present invention;

[0035] Figure 5 This is a schematic diagram of the opening design dimensions of the present invention;

[0036] Among them: 1-inlet shell, 2-flow detection mechanism, 3-connecting rod, 4-elastic element, 5-flow adjustment mechanism, 6-outlet shell, 201-guide block, 202-guide rod, 203-ear piece, 501-adjusting plate, 502-opening, 601-outlet, 602-boss, 603-guide groove, 604-limiting boss. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0038] It includes an inlet shell 1, a flow detection mechanism 2, a connecting rod 3, an elastic element 4, a flow regulating mechanism 5, and an outlet shell 6; wherein the flow detection mechanism 2 is a guide block 201 with an inclined arc surface, and the surface of the guide block 201 facing the incoming flow direction of the liquid is a concave arc, and the arc surface guides the liquid flow direction to bend at a large angle, thereby sensing the impulse of the liquid flow without generating a large mechanical energy loss. Preferably, a guide plate is arranged at the place where the liquid flow direction is bent according to an ideal one-dimensional flow field to reduce the flow resistance loss caused by the primary flow vortex; the surface of the flow detection mechanism 2 facing the incoming flow direction and the inner surface of the inlet shell 1 together constitute a liquid flow channel, The liquid is guided to change the flow direction in the inlet shell 1 and enter the outlet shell; a guide rod 202 is arranged along the incoming flow direction on the side of the guide block 201 facing away from the incoming flow, and a guide groove 603 is opened on the boss 602 inside the outlet shell 6 facing the incoming flow direction. The guide rod 202 extends into the guide groove 603 and can be telescopically moved along the incoming flow direction under the action of the guide groove 603. The boss 602 limits the guide block along the incoming flow direction; the elastic element 4 is arranged at the bottom of the guide groove 603 and is limited by the guide rod 202, so that the elastic element 4 is always in a compressed state during the entire moving stroke; the cross section of the guide rod 202 is the same as the cross section of the guide groove 603, and a small gap is maintained.

[0039] An ear piece 203 is provided on the side of the guide block 201 away from the incoming flow, and is hinged to the side of the connecting rod 3 close to the incoming flow; the connecting rod 3 is hinged to the flow regulating mechanism 5 on the side away from the incoming flow; the flow regulating mechanism 5 is a plate-like structure parallel to the guide groove 603, including an adjustment plate 501 and two openings 502, and the outlet shell 6 is provided with two outlets 601 perpendicular to the incoming flow direction and arranged side by side along the incoming flow direction, and the side of the adjustment plate 501 facing the outlet 601 is in sliding contact with the two outlets 601, and is limited and guided by two limiting bosses 604 on the inner side of the outlet shell 6, and can reciprocate along the line connecting the midpoints of the two outlets 601.

[0040] When liquid flows into the flow distribution and regulating device at a specific flow rate, a force is generated on the beveled arc surface of the flow detection mechanism 2, and the flow detection mechanism 2 is pushed to move in the incoming flow direction with a specific combined force. Under the guidance of the guide groove 603 on the boss 602, the flow detection mechanism 2 overcomes the elastic force of the elastic element 4 and pushes the flow detection and regulating mechanism 5 to move in the incoming flow direction through the connecting rod 3; the two openings 502 on the regulating plate 501 are special-shaped openings, and the part where the opening 502 overlaps with the outlet 601 forms an effective flow channel.

[0041] The distribution of different outlet flow regulation is determined by the area ratio required by the flow detection and regulation mechanism 5 at a specific equilibrium position, and the flow cross-sectional area A is larger than the area required for regulating the minimum flow outlet by throttling, thereby achieving a lower regulation resistance.

[0042] When the flow detection mechanism 2 moves along the incoming flow direction, the guide rod 202 squeezes the liquid in the guide groove 603 through the gap between the guide rod 202 and the guide groove 603 to achieve a damping effect and prevent the adjustment plate 501 from swinging frequently near the equilibrium position.

[0043] The moving direction of the flow regulating mechanism 5 is perpendicular to the flow direction of the liquid at each outlet 601, so as to eliminate the impulse generated by the flow regulating mechanism 5 during the flow of the liquid, which affects the force balance of the elastic element 4 and further interferes with the flow distribution result.

[0044] An impact-driven flow distribution and adjustment method for aviation includes the following steps:

[0045] 1. The outlet 601 is a square. The flow rates of the two outlets 601 a and b are Qa and Qb respectively, and the total inlet flow rate is Q; the spring stiffness is k;

[0046] 2. The required flow distribution relationship between the two outlets a and b is described by the following formula:

[0047]

[0048] 3. The guide block 201 is subjected to the impulse F1 at the inlet flow rate Q1. At this time, the outlet flow rate a is Qa1, the outlet flow rate b is Qb1, and when the inlet flow rate increases by a small increment δQ, the increase in lift is:

[0049]

[0050] The backward displacement of the adjustment plate is recorded as δx, which is expressed as follows:

[0051]

[0052] At this time, the length and width of the corresponding exit b that is not blocked by exit 502 is recorded as y, and the effective area changes of the two exits a and b are:

[0053] δA a =L a ·x (3)

[0054] δA b =-(L a -y)·x (4)

[0055] For the flow change, taking x as the independent variable for integral calculation, we have

[0056]

[0057] Combined with the known effective area A of outlets a and b when there is no flow in the example a0 and A b0 By combining the above equations (1) to (5), we can obtain y=f(x), and the shape of the special-shaped outlet 502 can be determined.

[0058] The width of the outlet 502 at any position is limited to within the side length La of the outlet 601.

[0059] There are three flow distribution points in this embodiment: 1. When the inlet flow is 800L / h, the a outlet flow is required to be 600L / h and the b outlet flow is 200L / h; 2. When the inlet flow is 900L / h, the a outlet flow is required to be 700L / h and the b outlet flow is 200L / h; 3. When the inlet flow is 1000L / h, the a outlet flow is required to be 800L / h and the b outlet flow is 200L / h. The spring stiffness coefficient is 1.11N / mm. When the inlet flow is 800L / h, the guide block is subjected to an impact force of 4N, and the outlets 601 are all squares with a side length of 10mm. According to the design method of the present invention, when the inlet flow rate is 800L / h, the adjustment plate is displaced by 3mm relative to the initial position of 0 flow rate, the effective area of ​​outlet a is 77mm^2, and the effective area of ​​outlet b is 25.67mm^2; when the inlet flow rate is 900L / h, the adjustment plate is displaced by 4.06mm relative to the initial position of 0 flow rate, the effective area of ​​outlet a is 86.56mm^2, and the effective area of ​​outlet b is 24.73mm^2; when the inlet flow rate is 1000L / h, the adjustment plate is displaced by 4.725mm relative to the initial position of 0 flow rate, the effective area of ​​outlet a is 97.25mm^2, and the effective area of ​​outlet b is 24.31mm^2. The effective flow cross-sectional area ratio of the two outlets at the three design points a and b is consistent with the flow requirement ratio, and multi-point automatic distribution can be achieved.

[0060] Since the driving force change of the regulating device is directly derived from the liquid flow rate, there is no need for parameter collection and control logic feedback control, so there is no control lag disadvantage unique to PID control.

[0061] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. An impact-driven flow distribution and adjustment device for aviation, characterized in that: It includes an inlet shell, a flow detection mechanism, a connecting rod, an elastic element, a flow regulating mechanism, and an outlet shell; the flow detection mechanism is a guide block with an inclined arc surface, a guide rod is arranged along the direction of the incoming flow on the side of the guide block facing away from the incoming flow, a guide groove is opened on the boss inside the outlet shell facing the direction of the incoming flow, the guide rod extends into the guide groove, and can move telescopically along the direction of the incoming flow under the action of the guide groove, and the boss plays a limiting role in the direction of the incoming flow for the guide block; an ear piece is arranged on the side of the guide block away from the incoming flow, and is hinged to the side of the connecting rod close to the incoming flow; the side of the connecting rod away from the incoming flow is hinged to the flow regulating mechanism; the flow regulating mechanism is a plate-like structure parallel to the guide groove, including an adjusting plate and two openings, the outlet shell is provided with two outlets perpendicular to the incoming flow direction and arranged side by side along the incoming flow direction, the side of the adjusting plate facing the outlet is in sliding contact with the two outlets, and is limited and guided by two limiting bosses on the inner side of the outlet shell, and can reciprocate along the line connecting the midpoints of the two outlets.

2. The device according to claim 1, characterized in that The elastic element is arranged at the bottom of the guide groove and is limited by the guide rod, so that the elastic element is always in a compressed state during the entire moving stroke.

3. The device according to claim 2, characterized in that The two openings on the regulating plate are special-shaped openings, and the overlapping parts of the openings and the outlets form an effective flow passage.

4. The device according to claim 3, characterized in that The cross section of the guide rod is the same as that of the guide groove, and a small gap is maintained.

5. The device according to claim 4, characterized in that The moving direction of the flow regulating mechanism is perpendicular to the flow direction of the liquid at each outlet, so as to eliminate the impulse generated by the flow regulating mechanism during the flow of the liquid, which affects the force balance of the elastic element and further interferes with the flow distribution result.

6. The device according to claim 5, characterized in that When the incoming liquid flows through the flow detection mechanism, the surface of the guide block facing the incoming flow direction of the liquid is a concave arc, and the arc surface guides the liquid flow direction to make a large angle turn, thereby sensing the impulse of the liquid flow. When the liquid flows into the flow distribution and adjustment device at a specific flow rate, a force is generated on the beveled arc surface of the flow detection mechanism, and the flow detection mechanism is pushed to move in the incoming flow direction with a specific combined force. Under the guidance of the guide groove on the boss, the flow detection mechanism overcomes the elastic force of the elastic element and pushes the flow detection and adjustment mechanism to move in the incoming flow direction through the connecting rod; the surface of the flow detection mechanism facing the incoming flow direction and the inner surface of the inlet shell together constitute a liquid flow channel, guiding the liquid to change the flow direction in the inlet shell and enter the outlet shell.

7. The device according to claim 6, characterized in that The distribution of different outlet flow regulation is determined by the area ratio required by the flow detection and regulation mechanism at a specific equilibrium position, and the flow cross-sectional area A is larger than the area required for throttling the minimum flow outlet to achieve lower regulation resistance.

8. The device according to claim 7, characterized in that When the flow detection mechanism moves along the incoming flow direction, the guide rod squeezes the liquid inside the guide groove through the gap between the guide rod and the guide groove, thereby achieving a damping effect and preventing the adjustment plate from swinging frequently near the equilibrium position.

9. The impact-driven flow distribution and adjustment method of the device according to claim 1, characterized in that: The steps include: Step 1: The outlet is a square. The flow rates of the two outlets a and b are Qa and Qb respectively, and the total inlet flow rate is Q; the spring stiffness is k; Step 2: The required flow distribution relationship between the two outlets a and b is described as follows: Step 3: The guide block is subjected to the impulse F1 at the inlet flow rate Q1. At this time, the outlet flow rate of a is Qa1, the outlet flow rate of b is Qb1, and when the inlet flow rate increases by a small increment δQ, the increase in lift is: The backward displacement of the adjustment plate is recorded as δx, which is expressed as follows: At this time, the length and width of the corresponding exit b that is not blocked by the exit is recorded as y, and the effective area changes of the two exits a and b are: δA a =L a ·x (3) δA b =-(L a -y)·x (4) For the flow change, taking x as the independent variable for integral calculation, we have Combined with the known effective area A of outlets a and b when there is no flow in the example a0 and A b0 By combining the above equations (1) to (5), we can obtain y=f(x), and the shape of the special-shaped outlet can be determined.

10. The adjustment method according to claim 9, characterized in that: The width of the outlet at any position is limited within the side length La of the outlet.

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