A throat area adjustment ring test device

Abstract

The present application belongs to the field of aero-engines, and particularly relates to a throat area adjustment ring test device. The present invention designs a novel throat area adjustment ring test device. The test device combines an axial displacement adjustment component, a radial displacement adjustment component and a load loading measurement component, and utilizes a closed-loop control system to dynamically and steplessly adjust the angle between the load and the axis of the throat area adjustment ring, and to apply a load to the throat area adjustment ring. Compared with the existing throat area adjustment ring test device, the test device has a small loading error, is easy to operate, and has good versatility.

Description

Technical Field

[0001] The present application belongs to the field of aero-engines, and in particular relates to a throat area adjustment ring test device. Background Art

[0002] Foreign countries started research in the field of vector nozzle technology earlier. At present, the United States and Russia have mastered the core key technologies in this field. In addition, Germany, the United Kingdom, Spain, France, Israel, Sweden and other countries have also made important progress in some areas. Vector nozzles can be mainly divided into mechanical, pneumatic jet, plasma jet and synthetic jet according to their working principles. Mechanical vector nozzles are currently more widely used in engineering. Mechanical vector nozzle control technology (TVC-Technical of Vector-nozzle Control) can be further divided into four types:

[0003] (1) Two-dimensional convergence-divergence nozzle control technology (2DCD-2Dimensional Convergence Diffusion);

[0004] (2) Pitch-type axisymmetric vector nozzle control technology;

[0005] (3) Spherical Convergence Vector Nozzle (SCFN) control technology;

[0006] (4) Axial-Symmetric Vectoring Exhaust Nozzle (AVEN)

[0007] Among them, binary vector nozzle and axisymmetric vector nozzle control technology are now more popular, and many countries are conducting research

[0008] AVEN vector nozzle is a mainstream aircraft engine vector thrust control mechanism. The typical AVEN device mainly includes: casing, servo actuator, throat area adjustment ring (A8 ring), outlet area adjustment ring (A9 ring), connecting rod, convergence adjustment plate, expansion adjustment plate, convergence section sealing plate, expansion section sealing plate, outer fairing and other components.

[0009] like Figure 2As shown, the A8 ring drives the convergence adjustment piece to control the throat area of ​​the engine nozzle; the A9 ring and the A8 ring jointly drive the expansion adjustment piece to control the vector nozzle outlet area and the vector deflection angle. A8 ring adjustment principle: The area adjustment at the engine throat is achieved through the A8 ring adjustment. The A8 ring only outputs axially and does not rotate, so the servo actuator moves synchronously. A8 area adjustment principle: The A8 servo actuator synchronously outputs displacement, drives the A8 ring to move along the engine axis, and the roller on the ring moves on the cam surface of the convergence adjustment piece, driving the convergence adjustment piece to rotate around the axis connected to the casing to achieve the expansion and contraction of the A8 area. The aerodynamic pressure at the engine throat is relatively large. Under the action of aerodynamic force, the center of the A8 ring can automatically balance on the engine axis. See the constraints and force conditions of the throat area adjustment ring (A8 ring) for details. Figure 5 ,

[0010] According to the existing literature and public data, there are two patents for throat area adjustment ring (A8 ring) test device, such as "A vector nozzle ring strength tester" and "A throat area adjustment ring fatigue life test device" (publication number: CN210123341U). The test method of the existing test device is as follows: the 6 restraint positions of the throat area adjustment ring (A8 ring) are fixed to the load-bearing base plate through a manually adjustable length tooling assembly (adjusted by threaded connection), and 15 load-loading assemblies (servo actuators and connecting fixtures) are installed at 15 pins connected to the convergence adjustment plate frame on the inner side, and the other ends of the 15 load-loading assemblies are pressed against the load-bearing base connected to the load-bearing base plate; due to the loading space of the loads of these two test devices The 15 load-loading components are limited, and no force sensor is installed in them. The test load is fed back by an external force sensor, that is, an external load-loading component with a force sensor is installed in addition to the 15 load-loading components (Note: Due to factors such as servo actuator processing or installation, the friction generated by the cylinder rods of different servo actuators during reciprocating motion is different, so 16 servo actuators with similar load outputs at the same oil pressure are required). The two ends of the external load-loading component (servo actuator, force sensor and connecting fixture) are constrained, and the actuator is connected in parallel with the 15 actuators and then connected to the same oil circuit. The load values ​​of all load-loading components are approximately fed back by the force sensor in the load-loading component. The schematic diagram of the external load-loading component is shown in Figure 6 .

[0011] The disadvantages of the existing throat area adjustment ring (A8 ring) test device and test method are as follows:

[0012] a) Since the friction force generated by the cylinder rods of different servo actuators during reciprocating motion is different, there is a loading error in the method of approximately feeding back the load values ​​of all load loading components through the force sensor in the external load loading component, so that the load actually loaded on the throat area adjustment ring (A8 ring) may exceed or fail to meet the test requirements;

[0013] b) One end of the 15 load-loading components is connected to the 15 pins connected to the convergence adjustment plate frame on the inner side of the throat area adjustment ring (A8 ring), and the other end is pressed against the bearing base connected to the bearing base plate. In the fatigue test, when the throat area adjustment ring (A8 ring) is subjected to a cyclic load, the load value of the trough cannot be 0N, otherwise the load-loading component may be disengaged from the bearing base, and the loading cannot continue, causing the test to be suspended;

[0014] c) When the angle between the load and the axis of the throat area adjustment ring (A8 ring) needs to be adjusted, the only way to adjust it is to manually change the length of the thread engagement (and it can only be adjusted according to a distance of 0.5N times the pitch, where N is an integer) or to replace the tooling (or servo actuator) of different lengths, which is not only inconvenient but also has limited versatility. Summary of the invention

[0015] In order to solve the above problems, the present application provides a throat area adjustment ring test device, which is used to apply loads of different angles to the A8 ring. The inner side of the A8 ring has multiple ear seats, and the ear seats are connected to the skeleton of the convergence adjustment piece. The test device is connected to the ear seats and applies loads to perform the test:

[0016] The circumferential uniform ball joint at the lower end of the A8 ring is provided with a plurality of axial displacement adjustment components, which are used to constrain the A8 ring and control the axial displacement of the A8 ring. The lower end of the axial displacement adjustment component is connected and installed on the basic platform, and each axial displacement adjustment component has an actuator cylinder.

[0017] Each ear seat of the A8 ring is respectively connected to a group of loading devices, and each group of loading devices includes: a load loading assembly hinged to the ear seat at the first end, and a radial displacement adjustment assembly hinged to the second end of the load loading assembly; all groups of radial displacement adjustment assemblies are installed on the same bearing beam, and the bearing beam is a circular ring with a radius greater than the A8 ring and arranged concentrically with the A8 ring; wherein the axis of the radial displacement adjustment assembly of each group and the axis of the load loading assembly are both located in the plane where the diameter of the ear seat corresponding to the A8 ring and the axis of the A8 ring are located; the radial displacement adjustment assembly has an actuator cylinder that enables the second end of the load loading assembly to move along the axial direction of the radial displacement adjustment assembly, and the load loading assembly has an actuator cylinder that applies a load to the ear seat along the axial direction of the load loading assembly, wherein the ball joint is a spatial connection joint, which consists of two parts, a ball and a ball shell. The joint only allows the two parts to rotate relative to each other around the common ball center, limiting their relative movement in three directions. The engineering background of the ball joint is ball bearings, fixed ball joint supports, etc. The restraint force of the support on the ball component passes through the center of the ball, and the three mutually perpendicular components can be used to replace the undetermined restraint force. The restraint that fixes the non-free body to its restraining object is called a fixed end restraint. Common examples include a wall facing a cantilever beam, the ground facing a large dam, etc. The fixed end restraint prevents the non-free body from moving or rotating in any direction.

[0018] Preferably, both the axial displacement adjustment component and the radial displacement adjustment component have a displacement sensing component, and the displacement sensing component is connected to a control system, and the control system analyzes the angle between the axis of the load-applying component and the axis of the A8 ring according to information from the displacement sensing component.

[0019] Preferably, the load applying assembly is equipped with a load sensor.

[0020] Preferably, the axial position of the bearing beam includes an axial position higher than the axial position of the A8 ring or an axial position lower than the axial position of the A8 ring.

[0021] Preferably, the bearing crossbeam is fixed by a bearing column whose axial height is adjustable.

[0022] Preferably, the radial displacement adjustment assembly includes a servo actuator connected to the load-bearing beam and a single-ear seat installed on the actuating shaft of the servo actuator, one side of the single-ear seat has a single ear hinged to the load-loading assembly, and the other side has a through hole, the through hole is connected to a linear guide rod fixed to the load-bearing beam, so that the single-ear seat moves axially along the linear guide rod, and the linear guide rod bears loads of the single-ear seat in multiple directions.

[0023] Preferably, the radial displacement adjustment component is parallel to the end surface of the A8 ring.

[0024] Preferably, the load loading assembly includes a servo actuator, a rectangular frame connector connected to the output shaft of the servo actuator, the rectangular frame connector is sleeved on the A8 ring, and at the corresponding position of the ear seat of the A8 ring, the rectangular frame connector has a simulated bushing connector, and the simulated bushing connector is the same as the bushing connector when the ear seat is connected to the skeleton of the convergence adjustment plate in a real environment.

[0025] Preferably, a linear motion bearing is installed in the through hole to reduce the friction between the through hole and the linear guide rod. Linear bearing is a linear motion system used in conjunction with a cylindrical shaft for linear travel. Since the load-bearing ball is in point contact with the bearing outer sleeve, the steel ball rolls with minimal friction resistance. Therefore, the linear bearing has low friction and is relatively stable. It does not change with the bearing speed, and can obtain smooth linear motion with high sensitivity and high precision. Linear bearing consumption also has its limitations. The most important thing is that the bearing has poor impact load capacity and poor load-bearing capacity. Secondly, the linear bearing has large vibration and noise when moving at high speed. The automatic selection of linear bearings is included. Linear bearings are widely used in sliding parts of industrial machinery such as precision machine tools, textile machinery, food packaging machinery, and printing machinery. Since the load-bearing ball is in point contact with the bearing, the load is small. The steel ball rotates with extremely small friction resistance, so that high-precision smooth motion can be obtained.

[0026] Preferably, the actuating strokes of the actuators of all axial displacement adjustment assemblies are synchronized.

[0027] Advantages of this application include:

[0028] a) Solve the problem of loading error caused by the difference in friction force when the cylinder rod of the servo actuator reciprocates;

[0029] b) Solve the problem that the load value of the trough cannot be 0N during fatigue test, and solve the problem that the load loading component is out of the bearing base and cannot continue to load, causing the test to be suspended;

[0030] c) Solve the problem that existing test equipment is inconvenient to install and has limited versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a throat area adjustment ring test device of a preferred embodiment of the present application;

[0032] Figure 2 This is a schematic diagram of the structure of a load loading component in a preferred embodiment of the present application;

[0033] Figure 3 This is a schematic diagram of the structure of a radial displacement adjustment component in a preferred embodiment of the present application;

[0034] Figure 4This is a schematic diagram of the structure of an axial displacement adjustment component in a preferred embodiment of the present application;

[0035] Figure 5 It is the working principle diagram of the A8 ring of the background knowledge of this application;

[0036] Figure 6 It is the background knowledge of this application A8 ring constraint and force diagram;

[0037] Figure 7 It is a schematic diagram of an external load loading component of the background knowledge of this application;

[0038] Among them, 1-bearing column; 2-bearing crossbeam; 3-radial displacement adjustment assembly; 4-load loading assembly; 5-new throat area adjustment ring (A8 ring); 6-axial displacement adjustment assembly; 7-base plate; 8-basic platform; 41-second servo actuator; 42-force sensor; 43-adapter plate; 44-screw and nut; 45-single ear, double ears and pin; 46-simulated bushing connector; 31-single ear seat; 32-displacement sensor; 33-linear motion bearing; 34-first servo actuator; 35-linear guide rod; 36-single ear body (including joint ball); 37-positioning block; 61-double ear body (excluding joint ball); 62-servo actuator; 63-displacement sensor; 64-single ear (including joint ball); DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0040] The present application provides a throat area adjustment ring test device, which is used to apply loads of different angles to the A8 ring 5. The inner side of the A8 ring 5 has a plurality of ear seats, and the ear seats are connected to the skeleton of the convergence adjustment piece. The test device is connected to the ear seats and applies loads to perform the test:

[0041] The circumferential uniform ball joint at the lower end of the A8 ring 5 is provided with a plurality of axial displacement adjustment components 6, which are used to constrain the A8 ring 5 and control the axial displacement of the A8 ring 5. The lower end of the axial displacement adjustment component 6 is connected and installed on the base platform 8, and each axial displacement adjustment component 6 has an actuator.

[0042] Each ear seat of the A8 ring 5 is connected to a group of loading devices, each group of loading devices includes: a load loading assembly 4 hinged to the ear seat at the first end, and a radial displacement adjustment assembly 3 hinged to the second end of the load loading assembly 4; all groups of radial displacement adjustment assemblies 3 are installed on the same bearing beam 2, and the bearing beam 2 is a circular ring with a radius greater than the A8 ring 5 and arranged concentrically with the A8 ring 5; wherein the axis of each group of radial displacement adjustment assembly 3 and the axis of the load loading assembly 4 are located in the plane where the diameter of the ear seat corresponding to the A8 ring 5 and the axis of the A8 ring 5 are located; the radial displacement adjustment assembly 3 has an actuator cylinder that enables the second end of the load loading assembly 4 to move along the axial direction of the radial displacement adjustment assembly 3, and the load loading assembly 4 has an actuator cylinder that applies a load to the ear seat along the axial direction of the load loading assembly 4, wherein the ball joint is a spatial connection joint, which consists of two parts, a ball and a ball shell. The joint only allows the two parts to rotate relative to each other around the common ball center, limiting their relative movement in three directions. The engineering background of the ball joint is ball bearings, fixed ball joint supports, etc. The restraint force of the support on the ball component passes through the center of the ball, and the three mutually perpendicular components can be used to replace the undetermined restraint force. The restraint that fixes the non-free body to its restraining object is called a fixed end restraint. Common examples include a wall facing a cantilever beam, the ground facing a large dam, etc. The fixed end restraint prevents the non-free body from moving or rotating in any direction.

[0043] In some optional embodiments, both the axial displacement adjustment component 6 and the radial displacement adjustment component 3 have displacement sensing components, which are connected to a control system that analyzes the angle between the axis of the load loading component 4 and the axis of the A8 ring 5 based on information from the displacement sensing components.

[0044] In some optional embodiments, the load applying assembly 4 is equipped with a load sensor.

[0045] In some optional embodiments, the axial position of the load-bearing beam 2 includes an axial position higher than the axial position of the A8 ring 5 or an axial position lower than the axial position of the A8 ring 5 .

[0046] In some optional embodiments, the bearing crossbeam 2 is fixed by a bearing column 1 whose axial height is adjustable.

[0047] In some optional embodiments, the radial displacement adjustment assembly 3 includes a first servo actuator 34 connected to the load-bearing beam 2 and a single-ear seat 31 installed on the actuating shaft of the first servo actuator 34, one side of the single-ear seat 31 has a single ear hinged to the load loading assembly 4, and the other side has a through hole, the through hole is connected to a linear guide rod 35 fixed to the load-bearing beam 2, so that the single-ear seat 31 moves axially along the linear guide rod 35, and the linear guide rod 35 bears loads of the single-ear seat 31 in multiple directions.

[0048] In some optional embodiments, the radial displacement adjustment component 3 is parallel to the end surface of the A8 ring 5 .

[0049] In some optional embodiments, the load loading assembly 4 includes a second servo actuator 41, and a rectangular frame connector connected to the output shaft of the second servo actuator 41, wherein the rectangular frame connector is sleeved on the A8 ring 5, and at the corresponding position of the ear seat of the A8 ring 5, the rectangular frame connector has a simulated bushing connector 46, and the simulated bushing connector 46 is the same as the bushing connector when the ear seat is connected to the skeleton of the convergence adjustment plate in a real environment.

[0050] In some optional embodiments, a linear motion bearing 33 is installed in the through hole to reduce the friction between the through hole and the linear guide rod 35. Linear bearings are a linear motion system used in conjunction with cylindrical shafts for linear travel. Since the load-bearing ball is in point contact with the bearing outer sleeve, the steel ball rolls with minimal friction resistance. Therefore, the linear bearing has low friction and is relatively stable. It does not change with the bearing speed, and can obtain smooth linear motion with high sensitivity and high precision. Linear bearing consumption also has its limitations. The most important thing is that the bearing has poor impact load capacity and poor load-bearing capacity. Secondly, linear bearings have large vibrations and noises when moving at high speeds. Linear bearing automation selection is included. Linear bearings are widely used in sliding parts of industrial machinery such as precision machine tools, textile machinery, food packaging machinery, and printing machinery. Since the load-bearing ball is in point contact with the bearing, the load is small. The steel ball rotates with extremely small friction resistance, so that high-precision smooth motion can be obtained.

[0051] In some optional embodiments, the actuating strokes of the actuators of all axial displacement adjustment assemblies 6 are synchronized.

[0052] An embodiment: Figure 1As shown, the base plate 7 and the bearing column 1 are fixed to the base platform 8 by threaded connection, the double-ear body without joint ball 61 in the axial displacement adjustment component 6 is connected to the base plate 7 by thread, the single-ear body with joint ball 64 in the axial displacement adjustment component 6 is connected to the front end 6 pairs of ear seats connected to the actuator cylinder through a pin shaft, the simulated bushing connector 46 in the load loading component 4 is connected to the 15 ear seats connected to the convergence adjustment piece skeleton on the inner side of the throat area adjustment ring A8 ring 5 through a pin shaft, the servo actuator 9 in the load loading component 4 is connected to the single ear seat 31 in the radial displacement adjustment component 3 through a pin shaft, the positioning block 37 and the single-ear body with joint ball 36 in the radial displacement adjustment component 3 are connected to the bearing crossbeam 2 by threaded connection, and the bearing crossbeam 2 is connected to the bearing column by threaded connection. See the load loading component 4, radial displacement adjustment component 3 and axial displacement adjustment component. Figure 2 to Figure 4 .

[0053] The load is applied by the load loading measurement component 4, and the load size is fed back by the force sensor 10 in the load loading measurement component 4. The radial displacement adjustment component 3 and the axial displacement adjustment component 6 can change the angle between the load loading measurement component 4 and the axis of the throat area adjustment ring A8 ring 5. The displacement value is fed back by the displacement sensors 32 and 63 in the component. The angle θ between the pull rod load and the axis of the throat area adjustment ring A8 ring 5 can be calculated using formula 1. All load loading measurement components and displacement adjustment components adopt a single-channel single-control mode. Note: The linear motion bearing 33 and the linear guide rod 35 in the radial displacement adjustment component 3 can also be in the form of a linear guide rail, changing the point contact to a surface contact to improve the load-bearing capacity of the radial displacement adjustment component 3.

[0054] The servo actuator, force (displacement) sensor and servo controller form a load (displacement) closed-loop control system to achieve follow-up stepless adjustment of the load (displacement).

[0055] Analytical method for the angle between the axis of the load-applying assembly and the axis of the A8 ring:

[0056]

[0057] Where:

[0058] θ——Load (F 试 ) and the axis of the throat area adjustment ring (A8 ring), unit: °;

[0059] R——Load (F 试 ) The radial distance between the action point at the lower end of the load measurement assembly and the axis of the throat area adjustment ring (A8 ring), unit: mm;

[0060] r——load (F 试) The radial distance between the upper end action point of the load measurement assembly and the axis of the throat area adjustment ring (A8 ring), unit: mm;

[0061] L——Load (F 试 ) The axial distance between the upper and lower action points of the loading measurement assembly along the axis of the throat area adjustment ring (A8 ring), unit: mm.

[0062] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A throat area adjustment ring test device, used for applying loads of different angles to an A8 ring (5), wherein the inner side of the A8 ring (5) has a plurality of ear seats, wherein the ear seats are connected to the frame of a convergence adjustment piece, and the test device is connected to the ear seats and applies loads to perform a test, wherein: The circumferential uniform ball joint at the lower end of the A8 ring (5) is provided with a plurality of axial displacement adjustment components (6) for constraining the A8 ring (5) and controlling the axial displacement of the A8 ring (5). The lower end of the axial displacement adjustment component (6) is connected and mounted on a base plate (7) and fixed on a base platform (8). Each axial displacement adjustment component (6) has an actuator. Each ear seat of the A8 ring (5) is respectively connected to a group of loading devices, and each group of loading devices comprises: a load loading assembly (4) whose first end is hinged to the ear seat, and a radial displacement adjustment assembly (3) hinged to the second end of the load loading assembly (4); all groups of radial displacement adjustment assemblies (3) are installed on the same bearing crossbeam (2), and the bearing crossbeam (2) is a circular ring with a radius greater than the A8 ring (5) and arranged concentrically with the A8 ring (5); wherein the axis of each group of radial displacement adjustment assembly (3) and the axis of the load loading assembly (4) are both located in the plane where the diameter of the ear seat corresponding to the A8 ring (5) and the axis of the A8 ring (5) are located; the radial displacement adjustment assembly (3) has an actuator cylinder for making the second end of the load loading assembly (4) move along the axial direction of the radial displacement adjustment assembly (3), and the load loading assembly (4) has an actuator cylinder for applying a load along the axial direction of the load loading assembly (4) to the ear seat.

2. The throat area adjustment ring test device according to claim 1, characterized in that: Both the axial displacement adjustment component (6) and the radial displacement adjustment component (3) have a displacement sensing component, and the displacement sensing component is connected to a control system. The control system analyzes the angle between the axis of the load applying component (4) and the axis of the A8 ring (5) based on information from the displacement sensing component.

3. The throat area adjustment ring test device according to claim 1, characterized in that: The load applying assembly (4) is equipped with a load sensor.

4. The throat area adjustment ring test device according to claim 1, characterized in that: The axial position of the load-bearing beam (2) includes an axial position higher than the axial position of the A8 ring (5) or an axial position lower than the axial position of the A8 ring (5).

5. The throat area adjustment ring test device according to claim 1, characterized in that: The bearing crossbeam (2) is fixed by a bearing column (1) whose axial height is adjustable.

6. The throat area adjustment ring test device according to claim 1, characterized in that: The radial displacement adjustment assembly (3) comprises a first servo actuator cylinder (34) connected to the load-bearing crossbeam (2) and a single-ear seat (31) mounted on an actuating shaft of the first servo actuator cylinder (34); one side of the single-ear seat (31) has a single ear hinged to the load-applying assembly (4), and the other side has a through hole, wherein the through hole is connected to a linear guide rod (35) fixed to the load-bearing crossbeam (2), so that the single-ear seat (31) moves axially along the linear guide rod (35), and the linear guide rod (35) bears loads of the single-ear seat (31) in multiple directions.

7. The throat area adjustment ring test device according to claim 1, characterized in that: The radial displacement adjustment component (3) is parallel to the end surface of the A8 ring (5).

8. The throat area adjustment ring test device according to claim 1, characterized in that: The load loading assembly (4) comprises a second servo actuator (41), a rectangular frame connector connected to the output shaft of the second servo actuator (41), the rectangular frame connector being sleeved on the A8 ring (5), and the rectangular frame connector having a simulated bushing connector (46) at a position corresponding to the ear seat of the A8 ring (5), the simulated bushing connector (46) being the same as the bushing connector when the ear seat is connected to the skeleton of the convergence adjustment plate in a real environment.

9. The throat area adjustment ring test device according to claim 6, characterized in that: A linear motion bearing (33) is installed in the through hole to reduce the friction between the through hole and the linear guide rod (35).

10. The throat area adjustment ring test device according to claim 1, characterized in that: The actuating strokes of the actuating cylinders of all the axial displacement adjustment components (6) are synchronized.

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