An air system automatic regulating method and system for turbine test

Abstract

The application provides an air system automatic regulation method for turbine test, comprising: classifying and sequencing valves in an air system according to contribution to turbine axial force to obtain an axial force domain valve list, and classifying valves in the air system according to influence on turbine performance to obtain a characteristic parameter domain valve list; dividing turbine axial force requirements into multiple regions according to turbine axial force requirements, wherein the multiple regions comprise a suitable region, a warning region and an emergency region; obtaining a turbine axial force measurement value in real time, and obtaining a turbine performance target input value, regulating one or more valves in the characteristic parameter domain valve list corresponding to the performance target according to the turbine performance target input value, if the turbine axial force measurement value is within the warning region, selecting a positive feedback valve or a negative feedback valve with a regulation margin from the axial force domain valve list according to priority from high to low to regulate, so that the axial force measurement value tends to the median value of the suitable region.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of turbine test, and particularly relates to an air system automatic regulation method and system for turbine test. BACKGROUND

[0002] As a core component of an aero gas turbine engine, the turbine directly determines the design level of the engine, and effectively obtaining the aerodynamic characteristics of the turbine component is crucial for both the forward design of the turbine and the matching of the whole engine. Since the engine turbine is a hot-end component, it is difficult to test on the whole engine level, so turbine component testing is an important means to obtain the aerodynamic characteristics of the turbine.

[0003] In turbine component testing, the air system needs to regulate the gas in the turbine component. However, the air system regulation not only needs to consider the cold gas flow ratio and cold gas pressure ratio required by the internal flow similarity of the turbine, but also needs to consider the sealing characteristics of the flow channel main gas and oil, and at the same time needs to consider the axial force balance involved in the test safety.

[0004] At present, when performing turbine component testing, only manual air system regulation is used. However, manual regulation can only target a single variable each time, and the number of parameters to be regulated during turbine component testing is large, so manual regulation is time-consuming and inefficient. In addition, during the air system state regulation process, the turbine component testing has high energy consumption, and the long regulation time period also results in high cost. SUMMARY

[0005] The purpose of the present application is to provide an air system automatic regulation method and system for turbine test, to solve or alleviate at least one problem in the background art.

[0006] The technical solution of the present application is: an air system automatic regulation method for turbine test, the automatic regulation method comprising:

[0007] classifying and sorting the valves in the air system according to the contribution to the turbine axial force, thereby obtaining an axial force domain valve list, and classifying the valves in the air system according to the influence on the turbine performance, thereby obtaining a characteristic parameter domain valve list;

[0008] According to the turbine axial force requirement, the turbine axial force level distribution is divided into multiple regions, including a suitable region, a warning region and an emergency region;

[0009] Real-time acquisition of turbine axial force measurement value, and acquisition of turbine performance target input value, according to the realization of the turbine performance target input value to regulate one or more valves in the valve list corresponding to the characteristic parameter domain of the performance target, wherein, if the turbine axial force measurement value is within the pre-warning region, a positive feedback valve or a negative feedback valve with adjustment margin is selected from the axial force domain valve list according to the priority from high to low to adjust, so that the axial force measurement value tends to the median value of the appropriate region.

[0010] In the preferred embodiment of the present application, the axial force domain valve list includes positive feedback valves, negative feedback valves and mixed valves;

[0011] The positive feedback valve refers to a valve whose opening degree is positively correlated with the turbine axial force and is irrelevant to the turbine characteristic parameter regulation;

[0012] The negative feedback valve refers to a valve whose opening degree is negatively correlated with the turbine axial force and is irrelevant to the turbine characteristic parameter regulation;

[0013] The mixed valve refers to a valve whose opening degree affects both the turbine axial force and the turbine characteristic parameter.

[0014] In the preferred embodiment of the present application, the mixed valve includes mixed positive feedback valve and mixed negative feedback valve.

[0015] In the preferred embodiment of the present application, the valves within the characteristic parameter domain and the valves within the axial force domain are not mutually exclusive, and any valve in the air system belongs to both the axial force domain valve list according to the axial force division and the characteristic parameter domain valve list according to the turbine performance influence division.

[0016] In the preferred embodiment of the present application, the pre-warning region is located on both sides of the appropriate region, and the emergency region is located on both sides of the pre-warning region.

[0017] In the preferred embodiment of the present application, during the valve regulation process, the regulation priority of the positive feedback valve is higher than that of the negative feedback valve at the same priority level.

[0018] In the preferred embodiment of the present application, during the valve regulation process, if the priority of a valve in the axial force domain valve list is higher than that of the valve being regulated, the valve is locked and cannot be adjusted.

[0019] In the preferred embodiment of the present application, when the turbine axial force measurement value is in the pre-warning region, all mixed valves are locked.

[0020] In the preferred embodiment of the present application, if the turbine axial force measurement value enters the emergency region during the valve adjustment process, all valves in the air system are locked and no valve can be adjusted.

[0021] In another aspect, the technical solution provided by the present application is: an air system automatic regulation system for turbine test, the automatic regulation system comprising:

[0022] Electric valves in the air system;

[0023] A control device connected to the electric valves and used for controlling the opening degree of the electric valves, the control device being used for controlling the electric valves in the air system according to the air system automatic regulation method for turbine test.

[0024] The air system automatic regulation method and system for turbine test provided by the present application realize the automatic control of the complex air system in turbine test based on the valve regulation of the air system in the multi-target coupling, can simultaneously control multiple variable parameters as the target compared with the existing manual regulation method, greatly shortens the regulation time and saves the test cost. In addition, the regulation method and regulation system of the present application have strict regulation logic, fully consider the interactive influence of multiple variables of the air system, clearly define the regulation priority, can realize fast and accurate regulation, and there is no "missing regulation" situation, greatly improves the regulation efficiency and safety. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions provided by the present application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the present application.

[0026] Figure 1 It is an air system automatic regulation method diagram of the present application.

[0027] Figure 2 It is an axial force domain valve list diagram of an embodiment of the present application.

[0028] Figure 3 It is a characteristic parameter valve list diagram of an embodiment of the present application.

[0029] Figure 4 It is an axial force distribution area diagram of an embodiment of the present application.

[0030] Figure 5 It is an axial force domain valve regulation process diagram of an embodiment of the present application.

[0031] Figure 6 It is a characteristic parameter domain valve regulation process diagram of an embodiment of the present application.

[0032] Figure 7 It is an air system automatic regulation system diagram of the present application. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0034] like Figure 1 As shown, this application provides an automatic control method for an air system used in turbine testing, the control method comprising the following steps:

[0035] First, classify and sort the air system valves used in turbine testing according to their contribution to the turbine axial force to obtain a valve list for the axial force domain. Then, classify these valves according to their impact on turbine performance to obtain a valve list for the characteristic parameter domain.

[0036] There are many valves involved in turbine axial force. The pressure in the air chamber generally affects the turbine axial force to varying degrees. The opening or closing of these valves, which regulate the chamber pressure, results in an increase or decrease in axial force, as well as variations in the magnitude of this increase or decrease. This process can be calculated using the air chamber area and flow path losses. Therefore, in this application, the valves involved in the air system are categorized and prioritized according to their contribution to the turbine axial force. The categorized types include positive feedback valves (i.e., valve opening increases axial force, valve closing decreases axial force), negative feedback valves (i.e., valve opening decreases axial force, valve closing increases axial force), mixed positive feedback valves, and mixed negative feedback valves.

[0037] In a valve, if the valve's opening adjustment involves both positive and negative feedback of axial force, it is called a mixed valve. Regardless of the magnitude of the axial force contribution, the priority of a mixed valve is weaker than that of a valve solely used for controlling axial force with positive or negative feedback. Mixed valves are further classified based on their axial force feedback capability into mixed positive feedback valves (mixed positive valves) and mixed negative feedback valves (mixed negative valves), such as... Figure 2 As shown.

[0038] In addition, the air system involved in turbine component testing has a large variety and number of characteristic parameters, but it has the following characteristics:

[0039] 1) A specific valve only affects a single characteristic parameter;

[0040] 2) A specific characteristic parameter is generally controlled or affected by a single valve. In special cases, it may be affected by multiple valves, but the opening and closing directions of these valves have the same influence on the parameter.

[0041] The aforementioned characteristics are determined by the inherent properties of turbine component testing. Based on this, this application establishes a list of characteristic parameter valves for achieving turbine performance targets, such as... Figure 3 As shown. For example, in this applicationFigure 3 In the embodiment, the performance target A to be achieved by the turbine is achieved by regulating the valves A1, A2 and A3 in the air system, the performance target B is achieved by regulating the valves B1, B2 and B3, the performance target C is achieved by regulating the valves C1 and C2, and so on. The number of valves to be regulated to achieve each performance target can be the same or different.

[0042] It should be noted that the valves in the characteristic parameter domain and the valves in the axial force domain are not mutually exclusive. A valve belongs to the list of axial force domain valves according to the axial force division, and at the same time, it can also belong to the list of characteristic parameter domain valves according to the characteristic parameter division. In the air system control process, the valves in the two domains need to be coordinated to avoid logical confusion.

[0043] II. According to the requirement of turbine axial force, the turbine axial force level distribution is divided into multiple regions, including a suitable region, a warning region and an emergency region.

[0044] As shown in Figure 3 According to the requirement of turbine axial force, the turbine axial force level distribution is divided into multiple regions in the present application, wherein the middle region G is the suitable region of turbine axial force, in which the turbine axial force level is in the best state; the regions Y1 and Y2 are the warning regions, which are distributed on both sides of the region G, the turbine axial force level in the region is relatively high or low, and approaches the limit value of turbine axial force; the regions R1 and R2 are the emergency regions of axial force overrun, which are distributed on both sides of the regions Y1 and Y2, the turbine axial force in the region indicates that it has exceeded the limit value of turbine axial force.

[0045] III. The turbine axial force measurement value is obtained in real time through the turbine test measurement system, and the turbine performance target input value input by the operator is obtained, and one or more valves in the list of characteristic parameter domain valves corresponding to the performance target are regulated according to the turbine performance target input value.

[0046] In the valve regulation process, if the turbine axial force measurement value is within the warning region, a positive feedback valve or a negative feedback valve with adjustment margin is selected from the list of axial force domain valves according to the priority from high to low to adjust, so that the axial force measurement value tends to the median value of the suitable region.

[0047] As shown in Figure 5 and Figure 6In the shown embodiment, the turbine axial force level is in the warning region (i.e. the suitable region + the warning region, G+Y1 / G+Y2), the turbine performance target input by the operator is B, the corresponding synchronous regulating valves are B1, B2, B3, B4 and B5 (not shown in the table), and the synchronous regulating valves B1-B5 are P1, P2, P3 and N1, N2 in the positive feedback valve and the negative feedback valve. The valves should be adjusted in the order of P1, N1, P2, N2 starting from P1, but the adjustment margin of the positive feedback valves P1 and P2 is 0 (i.e. no adjustment) at this time, and the adjustment margin of the negative feedback valves N1 and N2 is also 0, so the adjustment of the positive feedback valve P3 is started at this time to make the axial force measurement value tend to the middle value of the suitable region.

[0048] In the preferred embodiment of the present application, the priority of the positive feedback valve is higher than that of the negative feedback valve when the priorities are the same. Figure 5 In the shown embodiment, the positive feedback valve P1 and the negative feedback valve N1 are the highest priority valves, and the priorities of the two are the same, so the positive feedback valve P1 is used for the adjustment of the axial force when the positive feedback valve P1 and the negative feedback valve N1 both have an adjustment margin.

[0049] In addition, in the valve control process, the valves with a higher priority in the axial force domain valve list than the valve being controlled are locked, and the locked valves cannot be adjusted. In addition, when the turbine axial force measurement value is in the warning region (Y1 or Y2), all the mixed valves are locked.

[0050] In the valve control process, when the turbine axial force measurement value enters the warning region (R1 or R2), all the valves in the air system are locked, and no valve can be adjusted.

[0051] As shown in the table, the present application also provides an automatic control system for the air system of a turbine test, which comprises: Figure 7

[0052] A plurality of electric valves 10 in the air system;

[0053] A control device 20 connected to the electric valves 10 and used for controlling the opening of the electric valves 10, wherein the control device 20 controls the electric valves 10 in the air system according to the automatic control method for the air system of a turbine test.

[0054] ​The automatic regulation method of the turbine test air system provided by the application realizes automatic control of the complex air system in turbine test based on multi-target coupling, can simultaneously target multiple variable parameters compared with the existing manual regulation method, greatly shortens the regulation time, and saves the test cost. In addition, the regulation method and the regulation system of the application have strict regulation logic, fully consider the interactive influence of multiple variables of the air system, clearly define the regulation priority, can realize rapid and accurate regulation, and there is no case of "missing regulation", which greatly improves the regulation efficiency and safety.

[0055] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. An automatic air system regulation method for turbine testing, characterized in that, The automatic regulation method comprises: valves in the air system are classified and sorted according to the contribution to the turbine axial force, so as to obtain an axial force domain valve list, and the valves in the air system are classified according to the influence on the turbine performance, so as to obtain a characteristic parameter domain valve list; the turbine axial force level distribution is divided into multiple regions according to the turbine axial force requirement, the regions comprising a suitable region, a warning region and an emergency region; a turbine axial force measurement value is obtained in real time, and a turbine performance target input value is obtained, and one or more valves in the characteristic parameter domain valve list corresponding to the performance target are regulated according to the realization of the turbine performance target input value, wherein if the turbine axial force measurement value is within the warning region, a positive feedback valve or a negative feedback valve with an adjustment margin is selected from the axial force domain valve list according to the priority from high to low to adjust, so that the axial force measurement value tends to the median value of the suitable region.

2. The method of automatically regulating an air system for turbine testing of claim 1, wherein, The axial force domain valve list comprises positive feedback valves, negative feedback valves and mixed valves; The positive feedback valve refers to a valve whose opening degree is positively correlated with the turbine axial force and is irrelevant to the turbine characteristic parameter regulation. The negative feedback valve refers to a valve whose opening degree is negatively correlated with the turbine axial force and is irrelevant to the turbine characteristic parameter regulation. The mixed valve refers to a valve whose opening degree simultaneously affects the turbine axial force and the turbine characteristic parameter.

3. The method of claim 2, wherein the air system is automatically regulated by, The mixed valve comprises mixed positive feedback valves and mixed negative feedback valves.

4. The method of automatically regulating an air system for turbine testing of any one of claims 1 to 3, wherein, The valves in the characteristic parameter domain and the valves in the axial force domain are not mutually exclusive, and any valve in the air system belongs to the axial force domain valve list according to the axial force division, and also belongs to the characteristic parameter domain valve list according to the turbine performance influence division.

5. The method of automatically regulating an air system for turbine testing of claim 1, wherein, The warning region is located on both sides of the suitable region, and the emergency region is located on both sides of the warning region.

6. The method of automatically regulating an air system for turbine testing of claim 2, wherein, In the valve regulation process, the regulation priority of the positive feedback valve is higher than that of the negative feedback valve at the same priority level.

7. The method of automatically regulating an air system for turbine testing of claim 6, wherein, In the valve regulation process, if the priority of a valve in the axial force domain valve list is higher than that of the valve being regulated, the valve is locked and cannot be adjusted.

8. The automatic regulation method of an air system for turbine testing according to claim 6 or 7, characterized in that, When the turbine axial force measurement value is in the warning region, all mixed valves are locked.

9. The method of automatically regulating an air system for turbine testing of claim 8, wherein, If the turbine axial force measurement value enters the emergency region during the valve adjustment process, all valves in the air system are locked and cannot be adjusted.

10. An air system automatic regulation system for turbine testing, characterized by, The automatic regulation system comprises: a plurality of electric valves in an air system; a control device connected to the electric valves and used for controlling the opening degree of the electric valves, wherein the control device controls the electric valves in the air system according to the automatic regulation method for the air system of the turbine test according to any one of claims 1 to 9.

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