Device for quickly adjusting flow of large-diameter valve under hypersonic speed
By using parallel electrically controlled valves and model predictive control algorithms, the problem of excessively long response time of large-diameter electric valves was solved, achieving rapid and efficient flow regulation under hypersonic conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-03-10
AI Technical Summary
Existing large-diameter electric valves have excessively long response times and slow reaction rates under hypersonic conditions, making it difficult to meet the needs of rapid regulation.
Multiple electrically controlled valves are connected in parallel to form a large-diameter valve, and model predictive control algorithms and/or machine learning algorithms are used to synchronously regulate the mass flow rate of each electrically controlled valve, combined with a preset matrix table for flow regulation.
It enables rapid flow regulation of large-diameter valves, significantly shortening the regulation time, improving efficiency, and enhancing calculation accuracy and flow regulation accuracy.
Smart Images
Figure CN121635501A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of aero-engine testing, and in particular to a large-diameter valve flow quick adjusting device under hypersonic speed. BACKGROUND
[0002] The electric regulating valve is an automatic control valve, which controls the opening and closing of the valve and the position adjustment of the valve through an electric actuator. It can adjust the flow, pressure and temperature of the fluid according to the preset control signal, and is widely used in the fluid control system in industrial production. The existing valve types include regulating valves, throttling valves, butterfly valves, ball valves and the like, but the current valve has a long adjusting time in the use process.
[0003] The large-diameter electric valve is mainly applied to the field of aerospace, but due to the excessively large nominal diameter, the response time is excessively long and the reaction rate is excessively slow, which is extremely unfavorable for the engine test requiring quick adjustment. SUMMARY
[0004] In view of the deficiencies in the related art, the application provides a large-diameter valve flow quick adjusting device under hypersonic speed, which comprises a plurality of electric control valves connected in parallel to form a large-diameter valve, and the flow of the plurality of electric control valves is simultaneously regulated to quickly adjust the flow of the large-diameter valve, thereby solving the technical problem of excessively long response time and excessively slow reaction rate of the large-diameter electric valve.
[0005] The application provides a large-diameter valve flow quick adjusting device under hypersonic speed, which comprises a plurality of electric control valves connected in parallel to form a large-diameter valve for conveying gas, each electric control valve has a different number i, all the electric control valves are controlled to be opened and closed by a same control system, the mass flow of each electric control valve in the control system is The calculation formula is:
[0006] In the above formula, is the mass flow of the electric control valve, kg / h; is the flow coefficient of the large-diameter valve, ; is the flow area of the electric control valve, ; is the absolute pressure after the large-diameter valve, Pa; k is the adiabatic coefficient of the gas; Z is the gas compression factor; is the absolute gas temperature before the large-diameter valve, K; is the absolute pressure before the large-diameter valve, Pa; is the critical pressure ratio; wherein, , k, Z, are obtained through experiments, obtained by measuring or consulting the product specification of the electric control valve, 、 、 is a real-time measured value; The control system adopts a model predictive control algorithm and / or a machine learning algorithm to synchronously regulate the mass flow of each electric control valve so that the large-diameter valve quickly reaches the target flow rate.
[0007] In some embodiments, the mass flow Q of the large-diameter valve in the control system is calculated according to the following formula:
[0008] In the above formula, Q is the mass flow of the large-diameter valve, kg / h; is the flow coefficient of the large-diameter valve, ; is the flow area of the large-diameter valve, ; is the absolute pressure after the large-diameter valve, Pa; k is the adiabatic coefficient of the gas; and Z is the gas compression factor; is the gas temperature before the large-diameter valve, K; is the absolute pressure before the large-diameter valve, Pa; is the critical pressure ratio; wherein, , k, Z, are obtained through experiments, is the sum of all , 、 、 is a real-time measured value.
[0009] In some embodiments, the calculation formula of Z is as follows:
[0010] wherein P is the absolute pressure of the gas in the experimental container, Pa; is the molar volume of the gas in the experimental container, / mol; R is the molar constant of the gas, which is 8.3145 J / (mol K); and T is the absolute temperature in the experimental container, K.
[0011] The calculation formula of k is as follows:
[0012] wherein k is the adiabatic coefficient of the gas; and k is obtained by measuring with the sound velocity measurement method or the shock tube measurement method.
[0013] The flow coefficient and flow resistance coefficient of the valve were obtained by experimental methods.
[0014] In some of these embodiments, The distance between the sampling location and the inlet of the large-diameter valve is greater than or equal to twice the inner diameter of the large-diameter valve; Temperature is obtained by inserting a temperature sensor into the pipe at the inlet of a large-diameter valve. The insertion depth of the temperature sensor is 1 / 3 to 1 / 2 of the pipe's inner diameter.
[0015] In some embodiments, the flow area of the electrically controlled valve is 5. Up to 700 .
[0016] In some of these embodiments, The distance between the sampling location and the inlet of the large-diameter valve is greater than or equal to one times the inner diameter of the large-diameter valve. The distance between the sampling location and the outlet of the large-diameter valve is greater than or equal to one time the inner diameter of the large-diameter valve; , The pressure is obtained through two pressure transmitters.
[0017] In some embodiments, the electrically controlled valve has multiple opening degrees, including fully open, fully closed, and partially open.
[0018] In some embodiments, the electrically controlled valve has up to five opening degrees.
[0019] In some embodiments, the large-diameter valve is composed of multiple sets of electrically controlled valves connected in parallel. The flow areas of different sets of electrically controlled valves are different, while the flow areas of electrically controlled valves in the same set are the same. Each set has at least one electrically controlled valve.
[0020] In some embodiments, the control system has a built-in preset matrix table, which contains the number of each electrically controlled valve, all opening states, and the flow rate corresponding to each opening state. After receiving a flow rate adjustment command, the control system synchronously regulates the mass flow rate of each electrically controlled valve based on the matrix table using model predictive control algorithms and / or machine learning algorithms. ; When there is no unique combination of electrically controlled valve openings for a certain target flow rate, the control system compares the difference between the target flow rate and the current flow rate, and combines the current combination of electrically controlled valve openings to select the combination of electrically controlled valve openings that has the least impact on the continuity and uniformity of the flow as the optimal solution, and adjusts the opening of the electrically controlled valves accordingly.
[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention connects multiple electrically controlled valves in parallel to form a large-diameter valve. The control system uses model predictive control algorithms and / or machine learning algorithms to synchronously regulate the mass flow rate of each electrically controlled valve. This allows large-diameter valves to quickly reach the target flow rate, and the time required for flow regulation is less than that required for traditional large-diameter electric valves with the same inner diameter.
[0022] 2. The control system of this invention has a built-in preset matrix table, which contains the number of each electrically controlled valve, all opening states, and the flow rate corresponding to each opening state. The matrix table eliminates the need for flow calculation steps for individual electrically controlled valves during flow regulation, further improving the flow regulation efficiency of large-diameter valves. Attached Figure Description
[0023] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Fig. 1 This is a schematic diagram of the structure of the hypersonic large-diameter valve flow rapid adjustment device in a specific embodiment of the present invention; Fig. 2 This is a comparison chart of the flow regulation efficiency of the hypersonic large-diameter valve rapid flow regulation device under different algorithms and the flow efficiency of the traditional large-diameter valve in a specific embodiment of the present invention.
[0024] In the diagram: 1. Electrically controlled valve; 2. Control system. Detailed Implementation
[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0026] In the description of this invention, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0027] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.
[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0029] like Figs. 1-2 As shown in the schematic embodiment of the hypersonic large-diameter valve flow rate rapid adjustment device provided by the present invention, multiple electrically controlled valves 1 are connected in parallel to form a large-diameter valve for conveying gas. Each end of the large-diameter valve has two straight pipes, one of which is sealed to the inlet of all electrically controlled valves 1, and the other is sealed to the outlet of all electrically controlled valves 1. Each electrically controlled valve 1 has a different number i. All electrically controlled valves 1 are controlled to open and close by the same control system 2. The mass flow rate of each electrically controlled valve 1 within the control system 2 is... The calculation formula is:
[0030] In the above formula, The mass flow rate of electrically controlled valve 1 is kg / h; For large-diameter valves, ; The flow area of electrically controlled valve 1, ; ρ is the absolute pressure downstream of the large-diameter valve, in Pa; k is the gas adiabatic coefficient; Z is the gas compressibility factor. The absolute gas temperature upstream of the large-diameter valve, in K; The absolute pressure upstream of the large-diameter valve, in Pa; This is the critical pressure ratio; in, ,k,Z, Obtained through experiments, This information was obtained by measuring or consulting the product manual for electrically controlled valve 1. , , These are real-time measured values; Control system 2 uses model predictive control algorithms and / or machine learning algorithms to synchronously regulate the mass flow rate of each electrically controlled valve 1. This allows large-diameter valves to quickly reach the target flow rate, and the time required for flow regulation is less than that required for traditional large-diameter electric valves with the same inner diameter.
[0031] In some embodiments, the formula for calculating the mass flow rate Q of the large-diameter valve in control system 2 is:
[0032] In the above formula, Q is the mass flow rate of the large-diameter valve, kg / h; For large-diameter valves, ; For large-diameter valves, ; ρ is the absolute pressure downstream of the large-diameter valve, in Pa; k is the gas adiabatic coefficient; Z is the gas compressibility factor. The gas temperature before the valve of a large-diameter valve, in K; The absolute pressure upstream of the large-diameter valve, in Pa; This is the critical pressure ratio; in, ,k,Z, Obtained through experiments, For all the sum of , , These are real-time measurements.
[0033] The above formula can be used to directly and quickly calculate the mass flow rate Q of large-diameter valves without having to calculate the flow rate of each electrically controlled valve 1 and then add them together, which can reduce the calculation error of the mass flow rate Q of large-diameter valves.
[0034] In some embodiments, Z is calculated using the following formula:
[0035] Where P is the absolute pressure of the gas inside the experimental container, in Pa; This represents the molar volume of the gas inside the experimental container. / mol; R is the gas molar constant, which is 8.3145 J / (mol) K); T is the absolute temperature inside the experimental container, K.
[0036] k is obtained by measuring the speed of sound or by shock tube measurement.
[0037] The calculation formula is as follows:
[0038] Where k is the gas adiabatic coefficient.
[0039] The flow coefficient and flow resistance coefficient of the valve were obtained by experimental methods.
[0040] In some of these embodiments, The sampling location is at a distance greater than or equal to twice the inner diameter of the large-diameter valve inlet. This location is in a region with a relatively stable flow velocity distribution and a small temperature gradient, making it less susceptible to heat conduction interference from the large-diameter valve. In contrast, the area near the large-diameter valve may experience eddies or localized high / low temperature zones due to the throttling effect, resulting in larger temperature fluctuations.
[0041] Furthermore, The pipeline centerline from the data acquisition location to the inlet of the large-diameter valve is a straight line to reduce the impact of pipeline shape on calculation accuracy.
[0042] In some of these embodiments, Temperature is obtained by inserting a temperature sensor into the pipe at the inlet of a large-diameter valve. The insertion depth of the temperature sensor is 1 / 3 to 1 / 2 of the pipe's inner diameter, which reduces interference from heat conduction through the pipe wall and allows for rapid and accurate capture of temperature changes in the fluid near the center.
[0043] In some embodiments, the flow area of the electrically controlled valve 1 is 5. Up to 700 , With high accuracy in calculating Q, the flow rate of large-diameter valves can be adjusted quickly, reducing the flow rate adjustment time by at least half.
[0044] In some of these embodiments, The distance between the sampling location and the inlet of the large-diameter valve is greater than or equal to one times the inner diameter of the large-diameter valve. The distance between the sampling location and the outlet of the large-diameter valve is greater than or equal to one time the inner diameter of the large-diameter valve.
[0045] The above distance setting can ensure , The sampling area is located in a region with relatively stable flow velocity distribution, eliminating interference such as eddies and velocity distortion caused by throttling of large-diameter valves, making the pressure measurement values closer to the actual operating conditions. Simultaneously, vibrations generated by the opening and closing of large-diameter valves or media impacts... , The data collection will not cause significant interference.
[0046] Furthermore, , Obtained through two pressure transmitters.
[0047] Furthermore, , The pipeline centerline from the data acquisition point to the large-diameter valve is a straight line to reduce the impact of pipeline shape on calculation accuracy.
[0048] In some embodiments, the electrically controlled valve 1 has multiple opening degrees, including fully open, fully closed, and partially open, which can reduce the flow regulation step size and further improve the flow regulation efficiency of large-diameter valves.
[0049] The flow area in the half-open state is equal to half the flow area in the fully open state.
[0050] Furthermore, the electrically controlled valve 1 has up to five opening degrees to balance the structural complexity of the electrically controlled valve 1, the computational load of the control system 2, and the flow regulation speed.
[0051] In some embodiments, the large-diameter valve is composed of multiple groups of electrically controlled valves 1 connected in parallel. The flow areas of different groups of electrically controlled valves 1 are different, while the flow areas of electrically controlled valves 1 in the same group are the same. Each group has at least one electrically controlled valve 1 to reduce the number of electrically controlled valves 1 that need to be regulated and further improve the flow regulation efficiency of the large-diameter valve.
[0052] In some embodiments, the control system 2 has a built-in preset matrix table, which contains the number of each electrically controlled valve 1, all opening states, and the flow rate corresponding to each opening state. After receiving a flow rate adjustment command, the control system 2 synchronously regulates the mass flow rate of each electrically controlled valve 1 based on the matrix table using model predictive control algorithms and / or machine learning algorithms. This allows large-diameter valves to quickly reach the target flow rate.
[0053] The matrix table setup eliminates the need for flow calculation steps for a single electrically controlled valve during flow regulation, further improving the flow regulation efficiency of large-diameter valves.
[0054] Furthermore, when the opening combination of the electrically controlled valve 1 under a certain target flow rate is not unique, the control system 2 compares the difference between the target flow rate and the current flow rate, and combines the current opening combination of the electrically controlled valve 1 to select the opening combination of the electrically controlled valve 1 that has the least impact on the continuity and uniformity of the flow rate as the optimal solution, and adjusts the opening of the electrically controlled valve 1 accordingly.
[0055] In some embodiments, the hypersonic large-diameter valve flow rapid adjustment device also includes a bracket, and all electrically controlled valves 1 are regularly arranged and welded to the bracket.
[0056] Furthermore, all electrically controlled valves 1 are arranged in a matrix or trapezoidal pattern, with electrically controlled valves 1 having the same flow area located in the same row, and electrically controlled valves 1 having different flow areas located in different rows.
[0057] The preferred embodiment of the present invention includes all the technical features of all the above embodiments, and the efficiency of flow regulation using different algorithms based on this embodiment is as follows: Fig. 2 As shown in matrices 1, 2, and 3, the flow regulation efficiency of traditional large-diameter valves with the same inner diameter is as follows: Fig. 2 As shown in the traditional regulation, it can be seen that the flow regulation efficiency of large-diameter valves can be significantly improved by adopting this embodiment.
[0058] Through the description of several embodiments of the hypersonic large-diameter valve flow rapid regulation device of the present invention, it can be seen that the embodiments of the hypersonic large-diameter valve flow rapid regulation device of the present invention have at least one or more of the following advantages: 1. This invention connects multiple electrically controlled valves 1 in parallel to form a large-diameter valve, and the control system 2 uses model predictive control algorithm and / or machine learning algorithm to synchronously regulate the mass flow rate of each electrically controlled valve 1. This allows large-diameter valves to quickly reach the target flow rate, and the time required for flow regulation is less than that required for traditional large-diameter electric valves with the same inner diameter.
[0059] 2. The control system 2 of the present invention has a built-in preset matrix table, which contains the number of each electrically controlled valve 1, all opening states, and the flow rate corresponding to each opening state. The matrix table eliminates the need for flow calculation steps for a single electrically controlled valve 1 during flow regulation, further improving the flow regulation efficiency of large-diameter valves.
[0060] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0061] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.
Claims
1. A high-speed flow regulating device for large-diameter valves at hypersonic speeds, characterized in that, A plurality of electric control valves are connected in parallel to form a large-diameter valve for conveying gas, each electric control valve has a different number i, all electric control valves are controlled to open and close by a same control system, the mass flow of each electric control valve in the control system is The calculation formula is: In the above formula, is the mass flow of the electric control valve, kg / h; is the flow coefficient of the large-diameter valve, ; is the flow area of the electric control valve, ; is the absolute pressure after the large-diameter valve, Pa; k is the adiabatic coefficient of the gas; and Z is the gas compression factor; is the absolute gas temperature before the large-diameter valve, K; is the absolute pressure before the large-diameter valve, Pa; is the critical pressure ratio; wherein, , k, Z, By experiment, By measuring or consulting the product specification of the electrically controlled valve, , , is the real-time measured value; The control system employs model predictive control algorithm and / or machine learning algorithm to synchronously regulate the mass flow of each electrically controlled valve to make large-diameter valves quickly reach the target flow rate.
2. The high-speed large-diameter valve flow fast regulating device according to claim 1, characterized in that, The mass flow rate Q of the large-diameter valve in the control system is calculated by the formula: In the above formula, Q is the mass flow of the large-diameter valve, kg / h; is the flow coefficient of the large-diameter valve, ; is the flow area of the large-diameter valve, ; is the absolute pressure after the large-diameter valve, Pa; k is the adiabatic coefficient of the gas; Z is the gas compression factor; is the gas temperature before the large-diameter valve, K; is the absolute pressure before the large-diameter valve, Pa; is the critical pressure ratio; wherein , k, Z, By experiment, for all sum, , , is a real-time measurement.
3. The high-speed large-diameter valve flow fast regulating device according to claim 1, characterized in that, The calculation formula of Z is as follows: where P is the absolute pressure of the gas in the experimental vessel, Pa; V is the molar volume of the gas in the experimental vessel, m3 / mol; R is the molar constant of the gas, 8.3145 J / (mol K); and T is the absolute temperature in the experimental vessel, K. The calculation formula is as follows: k is the gas adiabatic coefficient; k is measured by the sound velocity measurement method or the shock tube measurement method; Obtained using valve flow coefficient and flow resistance coefficient test methods.
4. The high-speed large-diameter valve flow rapid regulating device according to any one of claims 1-3, characterized in that, the distance between the collection position and the entrance of the large-diameter valve is greater than or equal to twice the inner diameter of the large-diameter valve; obtained by a temperature sensor installed in the pipeline at the entrance end of the large-diameter valve in a plug-in manner, and the insertion depth of the temperature sensor is 1 / 3 to 1 / 2 of the inner diameter of the pipeline.
5. The high-speed large-diameter valve flow fast regulating device according to any one of claims 1-3, characterized in that, The flow area of the electrically controlled valve is 5 to 700 .
6. The high-speed large-diameter valve flow fast regulation device according to claim 5, characterized in that, the distance of the collection position from the large-bore valve inlet is greater than or equal to one diameter of the large-bore valve, the distance of the collection position from the large-bore valve outlet is greater than or equal to one diameter of the large-bore valve; , are obtained by two pressure transmitters, respectively.
7. The high-speed large-diameter valve flow rapid regulating device according to any one of claims 1-3, characterized in that, The electrically controlled valve has multiple opening degrees, including full opening, full closing and half opening.
8. The high-speed large-diameter valve flow fast regulation device according to claim 7, characterized in that, The electrically controlled valve has at most five opening degrees.
9. The high-speed valve flow fast regulating device of any one of claims 1-3, wherein, The large-diameter valve is composed of multiple groups of electrically controlled valves in parallel, the flow area of different groups of electrically controlled valves is different, the flow area of the same group of electrically controlled valves is the same, and each group has at least one electrically controlled valve.
10. The high-speed valve flow fast regulating device of any one of claims 1-3, wherein, The control system is built-in with a preset matrix table, which contains the number of each electrically-controlled valve, all opening states, and the flow corresponding to each opening state; after receiving the flow regulation instruction, the control system synchronously regulates and controls the mass flow of each electrically-controlled valve based on the matrix table using a model predictive control algorithm and / or a machine learning algorithm ; When the corresponding electrically controlled valve opening combination under a certain target flow rate is not unique, the control system compares the difference between the target flow rate and the current flow rate, combines the current electrically controlled valve opening combination, takes the electrically controlled valve opening combination with the least influence on the flow continuity and uniformity as the optimal scheme, and adjusts the electrically controlled valve opening degree accordingly.