Integrated multi-stage disc cavity rotor testing device

Abstract

The invention belongs to the field of multi-stage disc cavity rotor real-time synchronous measurement, and relates to an integrated multi-stage disc cavity rotor testing device which comprises a testing assembly, a telemetering receiver and a testing lead pipe. The test assembly is mounted on the wall surface of the rotor of the multi-stage integrated disc cavity structure and is used for measuring wall surface parameters of the multi-stage integrated disc cavity structure; the test lead tube is connected with a disc cavity of the multi-stage integrated disc cavity structure and is arranged along the axial direction of the engine, and a coupled antenna is arranged in the test lead tube; and the telemetering receiver is arranged on the stator structural member and is arranged corresponding to the telemetering transmitter in the test assembly. The testing assembly is installed in the shaft neck of the rotor, and real-time synchronous measurement of stress and temperature of the integrated disc cavity is achieved on the premise that the structure of the disc cavity is not changed through the innovative design of the mechanical internal testing device and the testing lead pipe. And meanwhile, the construction difficulty and workload of operators are greatly reduced through the design.

Description

Technical Field

[0001] The present application belongs to the field of real-time synchronous measurement of multi-stage disc cavity rotors, and in particular to an integrated multi-stage disc cavity rotor testing device. Background Art

[0002] Real-time synchronous measurement of multi-stage disc cavity rotors is a recognized problem in the engine testing industry. There are many technical bottlenecks, such as limited test modification space, difficulty in installing measurement points and leading out test signals. Especially for multi-stage narrow disc cavities, the test wire needs to continuously cross multiple ring cavities. The inner cavity space of each ring cavity is very narrow, and the operator cannot visually or directly operate it, resulting in the inability to lead out the test signal. The stress of multi-stage rotors can only be measured indirectly by non-contact method (fiber optic testing), and the temperature can only be measured by embedded crystals. However, the use of non-contact measurement has the disadvantages of poor accessibility to measurement points with complex surfaces such as the root of rotor blades and disc cavities, non-continuous sampling, non-direct measurement, and the dependence of stress measurement accuracy on simulation accuracy.

[0003] Therefore, how to achieve contact measurement of multi-stage disc cavity rotors is a problem that needs to be solved. Summary of the invention

[0004] The purpose of this application is to provide an integrated multi-stage disc cavity rotor testing device to solve the shortcomings of non-contact measurement in the prior art, such as poor accessibility to complex measuring points on rotor blade roots, disc cavities, etc., non-continuous sampling, non-direct measurement, and dependence of stress measurement accuracy on simulation accuracy.

[0005] The technical solution of the present application is: an integrated multi-stage disc cavity rotor testing device, comprising a testing assembly, a telemetry receiver and a test lead tube; the testing assembly is mounted on the wall of a rotor of a multi-stage integrated disc cavity structure, and is used to measure the wall parameters of the multi-stage integrated disc cavity structure; the test lead tube is connected to the disc cavity of the multi-stage integrated disc cavity structure, and is arranged along the axial direction of the engine, and a coupling antenna is arranged in the test lead tube, and the coupling antenna is led out to a measuring point; the testing assembly comprises a telemetry transmitter, a test lead and a sealing grate, and a shaft neck is arranged at a position of the multi-stage integrated disc cavity structure corresponding to the telemetry transmitter, and an annular cavity is opened in the shaft neck, and the telemetry transmitter, the test lead and the sealing grate are arranged in the annular cavity of the shaft neck; the telemetry receiver is arranged on a stator structure and is arranged corresponding to the telemetry transmitter.

[0006] Preferably, a lead hole is provided on the outer wall of the shaft neck, one end of the test lead is connected to the telemetry transmitter, and the other end passes through the lead hole into the test lead tube and is connected to the coupling antenna; the sealing grate teeth are arranged on the outside of the telemetry transmitter, the inner side of the sealing grate teeth is fixedly connected to the shaft neck, and the outer side is sealed with the adjacent stator structure.

[0007] Preferably, a positioning stop is provided at the installation edge of the journal.

[0008] Preferably, the test lead tube comprises a tube wall and a support seat; the tube wall is a cylindrical structure with a lead channel opened inside; there are a plurality of support seats and they are evenly spaced along the axis direction of the tube wall, and the spacing between adjacent support seats is L 跨距 A disc cavity mounting hole is opened at the position of the disc cavity corresponding to the test lead tube, and the support seat is connected to the disc cavity mounting hole, and the support seat adopts a runway type structure.

[0009] Preferably, a rib is provided at the front end of the tube wall, the rib is a disc structure, and the baffle cooperates with the stepped hole on the drum mounting side.

[0010] Preferably, metal dampers are installed at the ends of some of the support seats, and the installation distribution of the metal dampers is as follows: when n≤7, the metal dampers are installed on the first and last support seats in the opposite direction of the test lead tube; when 7≤n≤9, the metal dampers are respectively installed on the first, fourth or fifth and last support seats in the opposite direction of the test lead tube; n is the number of disc cavities in the multi-stage integrated disc cavity structure spanned by the lead tube.

[0011] Preferably, a lead-in hole is provided on the outer wall of the journal, and the radius R of the retaining edge is 挡 For: R 挡 =D1-D 2， Where D1 is the distance from the center line of the cavity mounting hole to the edge of the mounting edge, and D2 is the reserve thickness. Usually D2 ≥ H 壁 , H 壁 is the wall thickness of the tube wall; the wall thickness H of the tube wall 壁 For: H 壁 =m×Φ 孔 , m is an empirical value, in Φ 孔 ≤5mm, m=0.5~0.7,Φ 孔 is the lead hole diameter; the length L of the support seat is: L = 2 × H 壁 +Φ 孔 , D=H 壁 +0.5Φ 孔 ; The span between adjacent support seats L 跨距 =P 跨距 +P1,P 跨距 To test the axial spacing between adjacent disk spokes at the radius height of the lead tube position, P1 is an empirical value. When the spoke thickness is ≤5mm, P1=1mm~3mm.

[0012] Preferably, the test assembly and the test lead tube are symmetrically installed at any angular position of the multi-stage integrated disc cavity structure.

[0013] The integrated multi-stage disc cavity rotor test device of the present application installs the test assembly inside the rotor's journal, and through the innovative design of the mechanical internal test device and the test lead tube, the integrated disc cavity stress and temperature are measured in real time synchronously without changing the disc cavity structure. At the same time, the design also greatly reduces the construction difficulty and workload of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 This is a schematic diagram of the test component structure for this application;

[0017] Figure 3 This is a schematic diagram of the lead tube structure of this application;

[0018] Figure 4 for Figure 3 Middle CC section cutaway view;

[0019] Figure 5 This is a schematic diagram of the retaining wall structure of this application.

[0020] 1. Test assembly; 2. Test lead tube; 3. Sealing grate teeth; 4. Shaft neck; 5. Lead hole; 6. Positioning stop; 7. Retaining edge; 8. Pipe wall; 9. Support seat; 10. Lead channel; 11. Telemetry transmitter; 12. Telemetry receiver; 13. Metal damping. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] An integrated multi-stage disc cavity rotor test device, a measuring device that uses mounting side bolt holes to install test leads and lead out signals, such as Figure 1, including a test assembly 1, a telemetry receiver 12 and a test lead tube 2. The test assembly 1 is installed on the wall of a rotor of a multi-stage (≮9) integrated disc cavity structure, and is used to measure the wall parameters of the multi-stage integrated disc cavity structure. The specific number of stages of the multi-stage integrated disc cavity structure can be 4 to 9; the test lead tube 2 is connected to the disc cavity of the multi-stage integrated disc cavity structure, and is arranged along the axial direction of the engine. A coupling antenna is arranged in the test lead tube 2, and the coupling antenna is led out to the measuring point position.

[0023] Preferably, the test assembly 1 and the test lead tube 2 can be symmetrically installed at any angular position of the multi-stage integrated disc cavity structure. Specifically, 2 groups, 4 groups or more can be arranged to achieve wall parameter measurement of any stage of the disc on the basis of satisfying the rotor balance.

[0024] like Figure 2 The test assembly 1 includes a telemetry transmitter 11, a test lead and a sealing grate 3. A shaft neck 4 is provided at the position of the multi-stage integrated disc cavity structure corresponding to the telemetry transmitter 11. A ring cavity is provided in the shaft neck 4. The telemetry transmitter 11, the test lead and the sealing grate 3 are arranged in the ring cavity of the shaft neck 4. A lead hole 5 is provided on the outer wall of the shaft neck 4. One end of the test lead is connected to the telemetry transmitter 11, and the other end passes through the lead hole 5 and enters the test lead tube 2 to be connected to the coupling antenna; the sealing grate 3 is arranged on the outer side of the telemetry transmitter 11. The inner side of the sealing grate 3 is fixedly connected to the shaft neck 4, and the outer side is sealed with the adjacent stator structure to prevent internal cooling gas leakage and external hot gas from entering, ensuring the normal operation of the telemetry transmitter 11. By providing an annular cavity on the shaft neck 4, the annular telemetry transmitter 11 can be accommodated while meeting the rotor balancing requirements.

[0025] The telemetry receiver 12 is arranged on the stator structure and corresponds to the telemetry transmitter 11. Specifically, data transmission is realized between the telemetry transmitter 11 and the telemetry receiver 12 through the moving coil and the static coil. After the test assembly 1 collects the wall parameter measurement, it is transmitted to the measurement receiver through the coupling antenna, and then transmitted out of the engine through the measurement receiver, enters the data acquisition equipment, and finally obtains effective data.

[0026] Preferably, a positioning stop 6 is provided at the installation edge of the journal 4 to ensure the concentricity between the annular cavity and the main shaft of the engine.

[0027] like Figure 3-Figure 4Preferably, the test lead tube 2 includes a tube wall 8 and a support seat 9; the tube wall 8 is a cylindrical structure, and a lead channel 10 is opened inside; there are a plurality of support seats 9 and they are evenly spaced along the axial direction of the tube wall 8, and the spacing between adjacent support seats 9 is a span L; a disk cavity mounting hole is opened at the position of the disk cavity corresponding to the test lead tube 2, and the support seat 9 is connected to the disk cavity mounting hole. The support seat 9 adopts a runway-type structure to achieve the matching of the test lead tube 2 and the disk cavity, reduce stress concentration, and specifically reduce the stress concentration coefficient of the matching wheel spoke hole by 33% (compared with the circular hole), and at the same time, the lead tube body can be circumferentially stopped.

[0028] Combination Figure 5 Preferably, a rib 7 is provided at the front end of the tube wall 8, and the rib 7 is a disc structure. The baffle cooperates with the stepped hole on the drum mounting side to prevent the lead tube from moving axially in the integrated disc cavity.

[0029] Preferably, metal damping is installed at the end of part of the support seat 9, and the metal damping can adaptively fill the physical gap between the support seat 9 and the opening of the spoke plate to avoid vibration of the lead tube.

[0030] The metal damping installation distribution is as follows: when n≤7 (n is the number of wheel stages that the lead tube crosses), the metal damping is installed on the first and last support seats 9 in the reverse direction of the lead tube; when 7≤n≤9, the metal damping is installed on the first, fourth (or fifth) and last support seats 9 in the reverse direction of the lead tube. The space size of the lead channel 10 should be conducive to the operation and installation of the test lead and reduce the mass of the lead tube as much as possible. The diameter of the lead channel 10 is Φ 孔 =E×I×Φ 单根 (E is the empirical coefficient, when the outer skin of the test wire is made of fiber material, E = 0.7, when the outer skin of the test wire is made of metal material, E = 0.8~1; I is the number of wires installed in a single test lead tube 2; Φ 单根 is the diameter of a single test lead).

[0031] Preferably, the radius R of the rib 7 is 挡 For: R 挡 =D1-D 2， Where D1 is the distance from the center line of the cavity mounting hole to the edge of the mounting edge, and D2 is the reserve thickness. Usually D2 ≥ H 壁 , H 壁 is the wall thickness of the tube wall 8; the wall thickness H of the tube wall 8 壁 For: H 壁 =m×Φ 孔 , m is an empirical value, in Φ 孔 ≤5mm, m=0.5~0.7,Φ 孔 is the diameter of the lead hole 5; the length L of the support seat 9 is: L = 2 × H 壁 +Φ 孔 , D=H 壁+0.5Φ 孔 ; The span L between adjacent support seats 9 跨距 =P 跨距 +P1,P 跨距 To test the axial spacing between adjacent disk spokes at the radius height of the lead tube 2, P1 is an empirical value. When the spoke thickness is ≤5mm, P1=1mm~3mm.

[0032] During assembly, first insert the test lead tube 2 into the disc cavity in the reverse direction along the installation edge of the integrated disc cavity and the opening position of the spoke until the retaining edge 7 is installed in place. Then assemble the first and second discs, the test assembly 1, the third disc, and the fourth to ninth discs. The measuring point wire (temperature, stress or cavity pressure) on the spoke of the ninth disc is inserted into the lead tube along the forward direction, then passes through the combined assembly hole, and enters the internal telemetry transmitter 11 from the lead hole 5 along the outer wall of the test assembly 1.

[0033] Through the above design, the test assembly 1 is installed inside the rotor journal 4, and the mechanical internal test device and the innovative design of the test lead tube 2 realize the real-time synchronous measurement of the integrated disc cavity stress and temperature without changing the disc cavity structure. At the same time, this design also greatly reduces the construction difficulty and workload of the operator.

[0034] Finally, it should be noted that: the drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0035] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated multi-stage disc cavity rotor testing device, Features: The invention comprises a test assembly (1), a telemetry receiver (12) and a test lead tube (2); the test assembly (1) is mounted on the wall surface of a rotor of a multi-stage integrated disc cavity structure and is used to measure the wall surface parameters of the multi-stage integrated disc cavity structure; the test lead tube (2) is connected to the disc cavity of the multi-stage integrated disc cavity structure and is arranged along the axial direction of the engine; a coupling antenna is arranged in the test lead tube (2), and the coupling antenna is led out to a measuring point; the test assembly (1) comprises a telemetry transmitter (11), a test lead and a sealing grate (3); a shaft neck (4) is arranged at a position of the multi-stage integrated disc cavity structure corresponding to the telemetry transmitter (11); an annular cavity is opened in the shaft neck (4); the telemetry transmitter (11), the test lead and the sealing grate (3) are arranged in the annular cavity of the shaft neck (4); the telemetry receiver (12) is arranged on a stator structure and is arranged corresponding to the telemetry transmitter (11).

2. The integrated multi-stage disc cavity rotor testing device according to claim 1, Features: A lead hole (5) is provided on the outer wall of the shaft neck (4); one end of the test lead is connected to the telemetry transmitter (11), and the other end passes through the lead hole (5) into the test lead tube (2) and is connected to the coupling antenna; the sealing grate teeth (3) are arranged on the outer side of the telemetry transmitter (11); the inner side of the sealing grate teeth (3) is fixedly connected to the shaft neck (4), and the outer side is sealed and matched with the adjacent stator structure.

3. The integrated multi-stage disc cavity rotor testing device according to claim 2, Features: A positioning stop (6) is provided at the installation edge of the journal (4).

4. The integrated multi-stage disc cavity rotor testing device according to claim 1, Features: The test lead tube (2) comprises a tube wall (8) and a support seat (9); the tube wall (8) is a cylindrical structure, and a lead channel (10) is provided inside; there are a plurality of support seats (9) which are evenly spaced along the axial direction of the tube wall (8), and the spacing between adjacent support seats (9) is a span L; a disc cavity installation hole is provided at a position of the disc cavity corresponding to the test lead tube (2), the support seat (9) is connected to the disc cavity installation hole, and the support seat (9) adopts a runway-type structure.

5. The integrated multi-stage disc cavity rotor testing device according to claim 4, Features: The front end of the tube wall (8) is provided with a retaining edge (7), the retaining edge (7) is a disc structure, and the retaining plate cooperates with the stepped hole of the drum installation side.

6. The integrated multi-stage disc cavity rotor testing device according to claim 5, Features: Metal dampers are installed at the ends of some of the support seats (9), and the metal dampers are installed in the following distribution: when n≤7, the metal dampers are installed on the first and last support seats (9) in the reverse direction of the test lead tube (2); when 7≤n≤9, the metal dampers are installed on the first, fourth or fifth and last support seats (9) in the reverse direction of the test lead tube (2); n is the number of disc cavities in the multi-stage integrated disc cavity structure spanned by the lead tube.

7. The integrated multi-stage disc cavity rotor testing device according to claim 6, Features: A lead-in hole (5) is provided on the outer wall of the journal (4), and the radius R of the retaining edge (7) is 挡 For: R 挡 =D 1 -D 2， Where D 1 D is the distance from the center line of the cavity mounting hole to the edge of the mounting edge. 2 is the reserve thickness, usually D 2 ≥H 壁 , H 壁 is the wall thickness of the tube wall (8); the wall thickness H of the tube wall (8) 壁 For: H 壁 =m×Φ 孔 , m is an empirical value, in Φ 孔 ≤5mm, m=0.5~0.7,Φ 孔 is the diameter of the lead hole (5); the length L of the support seat tube wall (9) is: L = 2 × H 壁 +Φ 孔 , D=H 壁 +0.5Φ 孔 ; The span L between adjacent support seats (9) 跨距 =P 跨距 +P 1 , P 跨距 The axial distance between the adjacent disc spokes at the radius height of the test lead tube (2), P 1 It is an empirical value. When the thickness of the radial plate is ≤5mm, P 1 =1mm~3mm.

8. The integrated multi-stage disc cavity rotor testing device according to claim 1, Features: The test assembly (1) and the test lead tube (2) are symmetrically mounted at any angular position of the multi-stage integrated disc cavity structure.

Images