Combustion chamber static test device

Abstract

The present invention provides a combustion chamber static test device, comprising: an outer casing, a diffuser, an inner casing, an outer ring rear transition section, an inner ring rear transition section, an outer ring front transition section, an outer ring sealing plate, a center body rear sealing plate, a center body, a center body front sealing plate and a diffuser sealing plate; wherein, the inner side of the outer casing, the diffuser, the inner side of the outer ring front transition section, the rear side of the center body front sealing plate, the center body, the front side of the diffuser sealing plate, the outer side of the inner casing, the outer side of the inner ring rear transition section, the front side of the rear flange of the inner ring rear transition section, the front side of the center body rear sealing plate, the front side of the outer ring sealing plate and the inner side of the outer ring rear transition section constitute an outer ring cavity; the inner side of the inner casing, the rear side of the diffuser sealing plate, the center body and the inner side of the inner ring rear transition section constitute an inner ring cavity separated from the outer ring cavity.

Description

Technical Field

[0001] The invention mainly relates to the field of aviation engines, and in particular to a combustion chamber static test device. Background Art

[0002] The outer casing, diffuser, and inner casing of an aircraft engine combustion chamber are the main load-bearing components of the combustion chamber. The casing bears pressure, and the casing mounting edge and diffuser mounting edge bear axial force and torque, etc. For civil aircraft engines, airworthiness compliance requirements must be met, and the safety and reliability of load-bearing and pressure-bearing parts must be proven through tests or calculations and analysis. At present, the safety of the load-bearing parts of the combustion chamber is mainly verified through pressure and static tests.

[0003] During the static test of the combustion chamber, water, oil and other media can be used to apply pressure to the cavity, and the mounting edge can apply static loads through the actuator. Usually, static tests are carried out on the outer casing, diffuser and inner casing of the combustion chamber to assess each component. Although this method can effectively control the load of each part without being disturbed by other loads, it cannot truly and effectively consider the force transmission and mutual influence between components, and cannot fully simulate the actual force transmission of the combustion chamber components. The support of the test results is questioned.

[0004] Moreover, the outer casing and diffuser of the combustion chamber are connected by welding, and the diffuser and the inner casing are connected by bolts. The pressure of each annular cavity formed by them is different, and the static loads of each mounting edge are independent of each other. Therefore, it is necessary to design a test device that can apply different pressure loads to each cavity and different static loads to the mounting edge.

[0005] In addition, existing static tests generally use multiple actuators to perform static loading on the mounting edge, which may cause static eccentricity and the inability of the static force to synchronize with the pressure increase process.

[0006] In view of this, how to design a new type of combustion chamber static test device is particularly important. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a combustion chamber static test device, which can simulate the actual force transmission path of the combustion chamber and the mutual influence between components, evaluate the static safety of the combustion chamber and the actual location where damage occurs, and at the same time solve the problems of static load eccentricity and asynchronous increase of static and pressure loads.

[0008] To solve the above technical problems, the present invention provides a combustion chamber static test device, comprising: an outer casing, a diffuser, an inner casing, an outer ring rear transition section, an inner ring rear transition section, an outer ring front transition section, an outer ring sealing plate, a center body rear sealing plate, a center body, a center body front sealing plate and a diffuser sealing plate; wherein, the inner side of the outer casing, the diffuser, the inner side of the outer ring front transition section, the rear side of the center body front sealing plate, the center body, the front side of the diffuser sealing plate, the outer side of the inner casing, the outer side of the inner ring rear transition section, the front side of the rear flange of the inner ring rear transition section, the front side of the center body rear sealing plate, the front side of the outer ring sealing plate and the inner side of the outer ring rear transition section constitute an outer ring cavity; the inner side of the inner casing, the rear side of the diffuser sealing plate, the center body and the inner side of the inner ring rear transition section constitute an inner ring cavity separated from the outer ring cavity.

[0009] In one embodiment of the present invention, the outer casing and the outer ring front transition section, the outer ring front transition section and the center body front sealing plate, the center body front sealing plate and the center body, the center body and the center body rear sealing plate, the diffuser sealing plate and the diffuser and the inner casing, the inner casing and the inner ring rear transition section, the outer ring sealing plate and the outer ring rear transition section, and the outer ring rear transition section and the outer casing are respectively connected by bolts.

[0010] In one embodiment of the present invention, an axial sealing structure is further included at the bolt connection.

[0011] In one embodiment of the present invention, the contact surface between the rear flange of the inner ring rear transition section and the center body, the radial contact surface between the rear flange of the inner ring rear transition section and the center body rear sealing plate, the contact surface between the center body rear sealing plate and the outer ring sealing plate, and the contact surface between the diffuser sealing plate and the center body are respectively provided with radial sealing structures.

[0012] In one embodiment of the present invention, a gap cavity with variable axial size is provided between the rear flange of the inner ring rear transition section and the rear sealing plate of the center body.

[0013] In one embodiment of the present invention, the rear flange of the inner ring rear transition section can be deformed in the axial direction.

[0014] In one embodiment of the present invention, the pressure of the outer annular cavity is different from the pressure of the inner annular cavity.

[0015] In one embodiment of the present invention, the outer ring sealing plate is provided with an outer ring oil inlet hole, the center body is provided with an inner ring oil inlet hole, and the test device controls the pressure of the outer ring cavity and the inner ring cavity through the outer ring oil inlet hole and the inner ring oil inlet hole respectively.

[0016] Compared with the prior art, the present invention has the following advantages: the combustion chamber static test device of the present invention comprises an outer ring cavity and an inner ring cavity separated from each other. The test device can simulate the actual force transmission path of the combustion chamber and the mutual influence between the components, assess the static safety of the combustion chamber and the actual location where damage occurs, and at the same time solve the problems of static load eccentricity and asynchronous increase of static and pressure loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of a combustion chamber static test device according to one embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the pressure bearing process of a combustion chamber static test device according to one embodiment of the present invention;

[0020] Figure 3 is an enlarged view of a part A of a combustion chamber static test device according to an embodiment of the present invention;

[0021] Figure 4 It is an enlarged view of a part B of a combustion chamber static test device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0023] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0025] When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional views showing the device structure will not be partially enlarged according to the general scale, and the schematic views are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0028] In the context of the present application, a structure in which a first feature is described as being "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which an additional feature is formed between the first and second features, such that the first and second features may not be in direct contact.

[0029] It should be understood that when a component is referred to as being "on another component," "connected to another component," "coupled to another component," or "contacting another component," it may be directly on, connected to, coupled to, or contacting the other component, or there may be intervening components. In contrast, when a component is referred to as being "directly on another component," "directly connected to," "directly coupled to," or "directly contacting" another component, there are no intervening components. Similarly, when a first component is referred to as being "electrically in contact with" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even without direct contact between conductive components.

[0030] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0031] The following embodiments of the present invention provide a combustion chamber static test device, which can simulate the actual force transmission path of the combustion chamber and the mutual influence between components, evaluate the static safety of the combustion chamber and the actual location where damage occurs, and at the same time solve the problems of static load eccentricity and asynchronous increase of static and pressure loads.

[0032] The combustion chamber static test device of the present invention comprises: an outer casing, a diffuser, an inner casing, an outer ring rear transition section, an inner ring rear transition section, an outer ring front transition section, an outer ring sealing plate, a center body rear sealing plate, a center body, a center body front sealing plate and a diffuser sealing plate. Among them, the inner side of the outer casing, the diffuser, the inner side of the outer ring front transition section, the rear side of the center body front sealing plate, the center body, the front side of the diffuser sealing plate, the outer side of the inner casing, the outer side of the inner ring rear transition section, the front side of the rear flange of the inner ring rear transition section, the front side of the center body rear sealing plate, the front side of the outer ring sealing plate and the inner side of the outer ring rear transition section constitute an outer ring cavity. The inner side of the inner casing, the rear side of the diffuser sealing plate, the center body and the inner side of the inner ring rear transition section constitute an inner ring cavity separated from the outer ring cavity.

[0033] Figure 1 It is a structural schematic diagram of a combustion chamber static test device according to an embodiment of the present invention. Figure 2 It is a schematic diagram of the pressure bearing process of a combustion chamber static test device according to one embodiment of the present invention. Figure 3 It is an enlarged view of a part A of a combustion chamber static test device according to an embodiment of the present invention. Figure 4 It is an enlarged view of a part B of a combustion chamber static test device according to an embodiment of the present invention.

[0034] Combine the following Figures 1 to 4 The specific structure of the test device 10 is described. It is understood that the following description is only exemplary, and those skilled in the art can make various changes without departing from the spirit of the present invention.

[0035] refer to Figure 1 As shown, the combustion chamber static test device 10 includes: an outer casing 110, a diffuser 120, an inner casing 130, an outer ring rear transition section 140, an inner ring rear transition section 150, an outer ring front transition section 160, an outer ring sealing plate 170, a center body rear sealing plate 180, a center body 190, a center body front sealing plate 200 and a diffuser sealing plate 210.

[0036] Among them, the inner side of the outer casing 110, the diffuser 120, the inner side of the outer ring front transition section 160, the rear side of the center body front sealing plate 200, the center body 190, the front side of the diffuser sealing plate 210, the outer side of the inner casing 130, the outer side of the inner ring rear transition section 150, the front side of the rear flange 151 of the inner ring rear transition section 150, the front side of the center body rear sealing plate 180, the front side of the outer ring sealing plate 170 and the inner side of the outer ring rear transition section 140 constitute the outer ring cavity P1.

[0037] The inner side of the inner casing 130 , the rear side of the diffuser sealing plate 210 , the center body 190 , and the inner side of the inner ring rear transition section 150 form an inner ring cavity P2 separated from the outer ring cavity P1 .

[0038] It can be understood that in the following embodiments of the present invention, the combustion chamber static test device 10 is an annular structure with M as the center line.

[0039] In some embodiments, the outer casing 110 , the diffuser 120 , and the inner casing 130 may constitute a body section of the test device 10 .

[0040] It can be understood that the connection method of the outer casing 110, the diffuser 120 and the inner casing 130 should be consistent with the assembly relationship of the actual engine combustion chamber.

[0041] In some embodiments, the outer ring rear transition section 140 , the inner ring rear transition section 150 , and the outer ring front transition section 160 may constitute a transition section of the test device 10 , but the present application is not limited thereto.

[0042] It can be understood that the outer ring rear transition segment 140 , the inner ring rear transition segment 150 , and the outer ring front transition segment 160 are structures added to reduce the influence of the load application boundary on the rigidity of the combustion chamber.

[0043] It should be noted that, in the following embodiments of the present invention, the axial direction may refer to a direction parallel to the direction of the center line M, and the radial direction may refer to a direction radiating outward perpendicular to the center line M with the center line M as the axis.

[0044] In one embodiment of the present invention, the outer casing 110 and the outer ring front transition section 160, the outer ring front transition section 160 and the center body front sealing plate 200, the center body front sealing plate 200 and the center body 190, the center body 190 and the center body rear sealing plate 180, the diffuser sealing plate 210 and the diffuser 120 and the inner casing 130, the inner casing 130 and the inner ring rear transition section 150, the outer ring sealing plate 170 and the outer ring rear transition section 140, and the outer ring rear transition section 140 and the outer casing 110 are respectively connected by bolts.

[0045] Exemplary, reference Figure 1 As shown, the front end of the outer casing 110 is bolted to the outer ring front transition section 160 through their respective mounting edges. The rear mounting edge of the outer casing 110 is bolted to the outer ring rear transition section 140. The inner casing 130 is bolted to the front flange (not shown) of the inner ring rear transition section 150. The diffuser sealing plate 210 is bolted to the mounting edge of the diffuser 120 and the mounting edge of the inner casing 130. The front mounting edge and the rear mounting edge of the center body 190 are bolted to the center body front sealing plate 200 and the center body rear sealing plate 180 respectively. The outer side of the outer ring sealing plate 170 is bolted to the outer ring rear transition section 140. The mounting edge of the outer ring front transition section 160 is bolted to the center body front sealing plate 200.

[0046] In one embodiment of the present invention, the outer ring sealing plate 170 is provided with an outer ring oil inlet hole 171, and the center body 190 is provided with an inner ring oil inlet hole 191. The test device 10 controls the pressure of the outer ring cavity P1 and the inner ring cavity P2 through the outer ring oil inlet hole 171 and the inner ring oil inlet hole 191 respectively.

[0047] Exemplarily, through the outer ring oil inlet hole 171 and the inner ring oil inlet hole 191, water, oil or other media can be used to apply pressure to the outer ring cavity P1 and the inner ring cavity P2 respectively, thereby simulating the pressure of each cavity of a real engine combustion chamber.

[0048] It should be understood that the outer ring oil inlet hole 171 and the inner ring oil inlet hole 191 are local openings on the outer ring sealing plate 170 and the center body 190 respectively.

[0049] In one embodiment of the present invention, the combustion chamber static test device 10 further includes an axial sealing structure disposed at the bolt connection.

[0050] For example, an axial sealing method may be adopted at the mounting edge connections of the above-mentioned bolted connections to ensure air tightness.

[0051] In some examples, the axial sealing structure includes but is not limited to an axially arranged sealing groove, which can be used to place a sealing ring (not shown).

[0052] In one embodiment of the present invention, the contact surface between the rear flange 151 of the inner ring rear transition section 150 and the center body 190, the radial contact surface between the rear flange 151 of the inner ring rear transition section 150 and the center body rear sealing plate 180, the contact surface between the center body rear sealing plate 180 and the outer ring sealing plate 170, and the contact surface between the diffuser sealing plate 210 and the center body 190 are respectively provided with radial sealing structures.

[0053] Preferably, the radial sealing structure may include two radially arranged sealing grooves.

[0054] refer to Figure 3 As shown, the diffuser sealing plate 210 bolted to the flange 121 of the diffuser 120 is located outside the cylindrical center body 190, and two radial sealing grooves are provided on the contact surface between the diffuser sealing plate 210 and the center body 190, and a radial sealing structure is arranged to divide the combustion chamber static test device 10 into an outer ring cavity P1 and an inner ring cavity P2.

[0055] In one embodiment of the present invention, the pressure of the outer annular cavity P1 is different from the pressure of the inner annular cavity P2.

[0056] For example, the pressure of the outer annular cavity P1 may be greater than the pressure of the inner annular cavity P2 , but the present application is not limited thereto.

[0057] Continue to refer Figure 3As shown, axial sealing rings can be placed on the two contact surfaces where the diffuser sealing plate 210 is connected to the mounting edge of the diffuser 120 and the mounting edge of the inner casing 130. The axial sealing ring is located on the side close to the outer ring cavity P1. In this way, the liquid medium generating pressure will not penetrate each other from the contact surface.

[0058] refer to Figure 4 As shown, two radial sealing grooves are arranged on the outer surface of the rear flange 151 of the inner ring rear transition section 150 connected to the inner casing 130 that radially contacts the center body rear sealing plate 180 and the inner surface that contacts the center body 190 to ensure that the two contact surfaces are in a sealed state.

[0059] Two radial sealing grooves are provided on the contact surface between the center body rear sealing plate 180 and the outer ring sealing plate 170 to ensure the sealing of the contact surface to prevent the penetration of liquid medium.

[0060] The above sealing structure enables the outer ring cavity P1 and the inner ring cavity P2 to form two independent cavities.

[0061] When the combustion chamber static test device 10 is tested, the outer ring sealing plate 170 is subjected to the pressure of the liquid medium, which generates static force in the axial direction. Since only one end of the outer ring sealing plate 170 is connected to the outer ring rear transition section 140, the axial force is transmitted to the outer ring rear transition section 140 through the bolts, thereby applying an axial force load to the outer casing 110.

[0062] The front flange of the inner ring rear transition section 150 is connected to the inner casing 130 , and the inner and outer sides of the rear flange 151 of the inner ring rear transition section 150 are in contact with the center body 190 and the center body rear sealing plate 180 respectively.

[0063] In one embodiment of the present invention, a gap cavity P3 with a variable axial size is provided between the rear flange 151 of the inner ring rear transition segment 150 and the center body rear sealing plate 180 .

[0064] Preferably, the maximum axial dimension of the gap cavity P3 should be greater than the axial extension of the test device caused by pressure.

[0065] In some embodiments, the rear flange 151 of the inner ring rear transition segment 150 can be freely deformed along the axial direction.

[0066] Since the rear flange 151 of the inner ring rear transition section 150 has no bolt connection or other connection methods inside and outside, and can deform freely in the axial direction, the axial force generated by the pressure of the outer ring cavity P1 on the rear flange 151 of the inner ring rear transition section 150 can be directly transmitted to the inner casing 130 through the front flange of the inner ring rear transition section 150, so that the inner casing 130 is subjected to the axial force.

[0067] refer to Figure 1 , Figure 2 and Figure 4 As shown, by converting the cross-sectional area of ​​the outer ring sealing plate 170 and the cross-sectional area of ​​the rear flange 151 of the inner ring rear transition section 150 through the axial force and pressure of the mounting side, the combustion chamber static test device 10 can be made to have the same axial force as that of the actual engine combustion chamber.

[0068] In addition, the additional axial force generated by the pressure load can be transmitted to the center body 190 and the center body front sealing plate 200 through the center body rear sealing plate 180 to achieve the purpose of eliminating the additional axial force.

[0069] refer to Figure 3 As shown, the pressures of the cavities on both sides of the diffuser sealing plate 210 are different, and an axial force caused by the pressure difference is generated at the diffuser sealing plate 210. Therefore, when converting the cross-sectional area of ​​the rear flange 151 of the inner ring rear transition section 150 according to the axial force value of the inner casing 130, the influence of the axial force at the diffuser sealing plate 210 needs to be considered.

[0070] In the above embodiments of the present invention, the pressure generated by the liquid medium in the outer ring cavity P1 and the inner ring cavity P2 is evenly distributed, and the components of the combustion chamber static test device 10 are designed and processed to ensure that they have high dimensional accuracy. After precise assembly, the structure is symmetrical, which can make the axial force generated by the pressure symmetrical.

[0071] Compared with the traditional static test, which uses multiple actuators to perform static loading on the mounting edge, which may cause static eccentricity and the phenomenon that the static force cannot be synchronized with the pressure increase process, the test device 10 of the present invention uses multiple cavities to control the pressure respectively, and uses the pressure load to independently apply axial force to each mounting edge, which can more realistically simulate the actual load condition of the engine. Moreover, by using the pressure and the structure itself to generate axial force, the eccentricity problem of the test load can be effectively solved while ensuring the coaxiality requirements of the test piece structure processing, preventing the test results from being invalid due to eccentricity.

[0072] At the same time, during the test, when the pressure load increases, the axial force increases in proportion to the pressure load, which is closer to the load distribution of the actual engine tooling conditions and can better simulate the loading process of a real engine.

[0073] The test device of the present invention can directly determine the real weak parts and damage positions of the combustion chamber, and improve the structural optimization to be more targeted.

[0074] The above embodiments of the present invention propose a combustion chamber static test device, which can simulate the actual force transmission path of the combustion chamber and the mutual influence between components, evaluate the static safety of the combustion chamber and the actual location where damage occurs, and at the same time solve the problems of static load eccentricity and asynchronous increase of static and pressure loads.

[0075] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0076] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0077] In addition, unless explicitly stated in the claims, the order of the processing elements and sequences described in this application, the use of alphanumeric characters, or the use of other names are not intended to limit the order of the processes and methods of this application. Although the above disclosure discusses some invention embodiments that are currently considered useful through various examples, it should be understood that such details are only for illustrative purposes, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of this application. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only by software solutions, such as installing the described system on an existing server or mobile device.

[0078] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0079] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0080] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A combustion chamber static test device, comprising: Outer casing, diffuser, inner casing, outer ring rear transition section, inner ring rear transition section, outer ring front transition section, outer ring sealing plate, center body rear sealing plate, center body, center body front sealing plate and diffuser sealing plate; The inner side of the outer casing, the diffuser, the inner side of the outer ring front transition section, the rear side of the center body front sealing plate, the center body, the front side of the diffuser sealing plate, the outer side of the inner casing, the outer side of the inner ring rear transition section, the front side of the rear flange of the inner ring rear transition section, the front side of the center body rear sealing plate, the front side of the outer ring sealing plate and the inner side of the outer ring rear transition section constitute an outer ring cavity; The inner side of the inner casing, the rear side of the diffuser sealing plate, the center body and the inner side of the inner ring rear transition section form an inner ring cavity separated from the outer ring cavity; The outer ring sealing plate is provided with an outer ring oil inlet hole, the center body is provided with an inner ring oil inlet hole, and the test device controls the pressure of the outer ring cavity and the inner ring cavity through the outer ring oil inlet hole and the inner ring oil inlet hole respectively.

2. The test device according to claim 1, characterized in that The outer casing and the outer ring front transition section, the outer ring front transition section and the center body front sealing plate, the center body front sealing plate and the center body, the center body and the center body rear sealing plate, the diffuser sealing plate and the diffuser and the inner casing, the inner casing and the inner ring rear transition section, the outer ring sealing plate and the outer ring rear transition section, and the outer ring rear transition section and the outer casing are respectively connected by bolts.

3. The test device according to claim 2, characterized in that It also includes an axial sealing structure arranged at the bolt connection.

4. The test device according to claim 1, characterized in that The contact surface between the rear flange of the inner ring rear transition section and the center body, the radial contact surface between the rear flange of the inner ring rear transition section and the center body rear sealing plate, the contact surface between the center body rear sealing plate and the outer ring sealing plate, and the contact surface between the diffuser sealing plate and the center body are respectively provided with radial sealing structures.

5. The test device according to claim 1, characterized in that: A gap cavity with variable axial size is provided between the rear flange of the inner ring rear transition section and the rear sealing plate of the center body.

6. The test device according to claim 1, characterized in that: The rear flange of the inner ring rear transition section can be deformed in the axial direction.

7. The test device according to claim 1, characterized in that The pressure of the outer annular cavity is different from the pressure of the inner annular cavity.

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