A turbo-rotor surge simulation device

Abstract

The present disclosure discloses a turbo rotor surge simulation device, comprising: a base, a turbo rotor structure and a surge casing structure are arranged on the base, the turbo rotor structure and the surge casing structure are continuously changed by rotating at the same time to simulate the turbo rotor surge.

Description

Technical Field

[0001] This disclosure pertains to the field of turbine rotor vibration testing, and specifically relates to a turbine rotor surge simulation device. Background Technology

[0002] Turbomachinery is a crucial and widely used component in systems such as aviation, shipbuilding, and energy industries. Rotor blades are a key component of turbomachinery, typically operating under harsh conditions of high temperature, high pressure, and high speed. Surge, a typical aerodynamically unstable flow state in engines, is an axisymmetric unstable flow existing throughout the entire compression system. It manifests as low-frequency pulsations in parameters such as the flow rate through the system and the compressor outlet pressure over time along the engine axis. This pulsation significantly reduces engine efficiency and performance; in severe cases, it can cause engine failure or even destruction, leading to catastrophic consequences.

[0003] In the aviation industry, surge tests are often used to analyze pressure changes during compressor surge. By analyzing the pulsating pressure changes, the real-time airflow conditions inside the compressor can be judged and predicted, which is of great significance for compressor stability monitoring. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present disclosure aims to provide a turbine rotor surge simulation device. This device controls the gas flow rate by rotating a geared disk to open and close openings in the casing, thereby simulating rotor surge.

[0005] To achieve the above objectives, this disclosure provides the following technical solutions:

[0006] A turbine rotor surge simulation device, comprising:

[0007] Base

[0008] The base is equipped with a turbine rotor structure and a surge casing structure.

[0009] The turbine rotor structure and the surge casing structure rotate simultaneously, causing the airflow to change continuously, in order to simulate turbine rotor surge.

[0010] Preferably, the device further includes a first drive structure.

[0011] Preferably, the first driving structure includes:

[0012] spindle

[0013] One end of the spindle is connected to the spindle motor via a coupling, and the other end is connected to the turbine rotor structure.

[0014] Preferably, the turbine rotor structure includes:

[0015] The turbine rotor disk has blades evenly arranged on it, and a perforation is provided at the center of the turbine rotor disk. The main shaft is connected to the turbine rotor disk through the perforation.

[0016] Preferably, the turbine rotor disk is also provided with a locking nut.

[0017] Preferably, the surge housing structure includes:

[0018] Casing base,

[0019] The casing body is mounted on the casing base, and the casing body is wrapped around the outside of the turbine rotor disk.

[0020] Preferably, the device further includes a second drive structure for driving the surge housing structure.

[0021] Preferably, the second drive structure includes a servo motor and a drive gear, wherein the servo motor drives the surge housing structure through the drive gear.

[0022] This disclosure also provides a method for simulating turbine rotor surge, comprising the following steps:

[0023] S100: The first drive structure drives the turbine rotor structure to rotate;

[0024] S200: The second drive structure drives the surge housing structure to rotate;

[0025] S300: The turbine rotor structure and surge casing mechanism cause the airflow to change rapidly during rotation in order to simulate turbine rotor surge.

[0026] Compared with the prior art, the beneficial effects of this disclosure are as follows: This disclosure can flexibly control the opening and closing of the gas outlet end of the casing and the gas flow rate. The opening and closing can be quickly achieved by driving a rotating gear disk with a motor, resulting in fast response speed and easier rotor surge. At the same time, the casing can be expanded, which can be used to study the relationship between rotor surge and pressure changes at the gas outlet end. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a turbine rotor surge simulation device provided in one embodiment of the present disclosure;

[0028] Figure 2 yes Figure 1 A schematic diagram of the rotor motion module in the turbine rotor surge simulation device shown;

[0029] Figure 3 yes Figure 1 A schematic diagram of the casing and valve opening and closing mechanism in the turbine rotor surge simulation device shown.

[0030] Figure 4 This is a schematic diagram of the surge housing expansion;

[0031] Figure 5 This is a schematic diagram of the casing end cover and rotating gear disk structure;

[0032] The annotations in the attached figures are explained as follows:

[0033] 1. Base; 2. Motor mount; 3. Main spindle motor; 4. Coupling; 5. Main spindle; 6. Bearing housing; 7. Turbine rotor disk; 8. Locking nut; 9. Casing body; 10. Casing base; 11. Extended casing; 12. Casing end cover; 13. Rotating gear disk; 14. Bearing; 15. Snap ring; 16. Drive gear; 17. Servo motor mount; 18. Servo motor. Detailed Implementation

[0034] The following will refer to the appendix. Figures 1 to 5 Specific embodiments of this disclosure are described in detail. While specific embodiments of this disclosure are shown in the accompanying drawings, it should be understood that this disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0035] It should be noted that certain terms are used in the specification and claims to refer to specific structures. Those skilled in the art will understand that different terms may be used to refer to the same structure. This specification and claims do not distinguish structures based on differences in terminology, but rather on differences in their functions. The terms "comprising" or "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising but not limited to." The following descriptions of preferred embodiments of this disclosure are for the purpose of implementing the general principles of the specification and are not intended to limit the scope of this disclosure. The scope of protection of this disclosure is determined by the appended claims.

[0036] To facilitate understanding of the embodiments of this disclosure, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings do not constitute a limitation on the embodiments of this disclosure.

[0037] In one embodiment, such as Figure 1 As shown, this disclosure provides a turbine rotor surge simulation device, comprising:

[0038] Base 1;

[0039] The base 1 is equipped with a turbine rotor structure and a surge casing structure;

[0040] The turbine rotor structure and the surge casing structure rotate simultaneously, causing the airflow to change continuously, in order to simulate turbine rotor surge.

[0041] In another embodiment, the device further includes a first drive structure.

[0042] In this embodiment, the first drive structure includes a main shaft 5, which is located on a bearing housing 6. One end of the main shaft 5 is connected to a main shaft motor 3 located on a motor housing 2 via a coupling 4, and the other end is connected to a turbine rotor structure.

[0043] In another embodiment, such as Figure 2 As shown, the turbine rotor structure includes:

[0044] The turbine rotor disk 7 has blades evenly arranged on it, and a through hole is provided at the center of the turbine rotor disk. The main shaft 5 is connected to the turbine rotor disk 7 through the through hole and fixed by the locking nut 8.

[0045] In another embodiment, such as Figure 3 , Figure 4 and Figure 5 As shown, the surge housing structure includes:

[0046] Casing base 10;

[0047] A casing body 9 is mounted on the casing base 10, and the casing body 9 is wrapped around the outside of the turbine rotor disk 7.

[0048] In this embodiment, the casing body 9 is sequentially connected to an extended casing 11 and a casing end cover 12 along the direction away from the turbine rotor disk 7. The casing end cover 12 is connected to a rotating gear disk 13 via a bearing 14, and the bearing 14 is limited by a retaining ring 15. In addition, multiple openings are evenly arranged on the casing end cover and the rotating gear disk to serve as air outlets for the entire surge casing structure. Furthermore, the openings are fan-shaped to correspond to the fan-shaped blades on the turbine rotor disk. When the turbine rotor disk rotates under the drive of the first drive structure, the multiple blades evenly arranged on it pass through the openings in sequence. Since the blades continuously rotate in a circular motion, the size of the air outlet formed between the blades and the openings is also continuously changing. Therefore, the airflow through the openings is also continuously changing (when the blades and the openings are completely aligned, the air outlets are closed, and the airflow is at its minimum or even zero; when the blades and the openings are not completely aligned, the air outlets are open, and the airflow is at its maximum), thereby achieving the surge effect of the turbine rotor disk. In addition, the sector angle of each opening is 29° (since there are 6 evenly arranged openings on both the casing end cover and the rotating gear disk, if the sector angle of each opening were 30°, it would be possible to achieve complete closure. However, in actual operation, it is difficult to achieve a perfect fit, which would result in air leakage. Therefore, in this embodiment, the opening angle is set to less than 30°, and 29° is only an example and can be slightly adjusted according to the actual situation). Furthermore, the outer diameter of the opening on the casing end cover is larger than the outer diameter of the opening on the rotating gear disk, and the inner diameter of the opening on the casing end cover is smaller than the inner diameter of the opening on the rotating gear disk, so that the turbine rotor disk can achieve the best surge effect.

[0049] Furthermore, it should be noted that the inner diameter D1 of the casing body and the outer diameter D2 of the turbine rotor disk must satisfy the following formula: D1 = D2 + 1mm ± 0.05mm. Satisfying this formula ensures that the clearance between the blade tip and the casing is 0.5 ± 0.025mm. If the clearance is too large, it will lead to a pressure drop; if the clearance is too small, it may cause the blade tip to rub against the casing.

[0050] In another embodiment, the device further includes a second drive structure, which includes a servo motor mount 17, on which a servo motor 18 is mounted. The servo motor 18 is connected to a drive gear 16, which meshes with a rotating gear disk 13. The tooth width of the drive gear is greater than the tooth width of the rotating gear disk, so that the driving force of the servo motor can be fully transmitted to the rotating gear disk, thereby ensuring that the rotating gear disk reaches the optimal rotation state.

[0051] All the above embodiments are only for illustrating the technical concept and features of this disclosure, and are intended to enable those skilled in the art to understand the content of this disclosure and implement it accordingly. They should not be construed as limiting the scope of protection of this disclosure. All equivalent changes or modifications made in accordance with the spirit and essence of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A turbine rotor surge simulation device, comprising: Base; The base is equipped with a turbine rotor structure and a surge housing structure; The turbine rotor structure and the surge casing structure rotate simultaneously to continuously change the airflow rate in order to simulate turbine rotor surge. The device includes a first drive structure for driving the turbine rotor structure to rotate; The turbine rotor structure includes: a turbine rotor blade disk, on which blades are evenly arranged; The surge casing structure includes: a casing base; a casing body is disposed on the casing base, and the casing body is wrapped around the outside of the turbine rotor disk; The main body of the casing is connected in sequence with an extended casing and a casing end cover along the direction away from the turbine rotor disk. The casing end cover is connected to a rotating gear disk through a bearing. Multiple openings are evenly arranged on the casing end cover and the rotating gear disk to serve as the air outlets of the entire surge casing structure. Furthermore, the openings are fan-shaped to correspond to the fan-shaped blades on the turbine rotor disk. The device further includes a second drive structure for driving the surge housing structure. The second drive structure includes a servo motor mount, on which a servo motor is mounted. The servo motor is connected to a drive gear, which meshes with a rotating gear disk.

2. The apparatus according to claim 1, wherein, The first driving structure includes: spindle; One end of the spindle is connected to the spindle motor via a coupling, and the other end is connected to the turbine rotor structure.

3. The apparatus according to claim 2, wherein, A perforation is provided at the center of the turbine rotor disk, and the main shaft is connected to the turbine rotor disk through the perforation.

4. The apparatus according to claim 3, wherein, The turbine rotor disk is also equipped with a locking nut.

5. A method for simulating turbine rotor surge based on the turbine rotor surge simulation device of claim 1, comprising the following steps: S100: The first drive structure drives the turbine rotor structure to rotate; S200: The second drive structure drives the surge housing structure to rotate; S300: The turbine rotor structure and surge casing mechanism cause the airflow to change rapidly during rotation in order to simulate turbine rotor surge.

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