A method for testing the wind resistance of a compressor rotating disk
By obtaining different test specimens and air supply methods, and combining the addition and subtraction elimination method, the wind resistance torque on the surface of the compressor intake disc cavity is calculated, which solves the problem that the traditional method cannot accurately measure the wind resistance of a specific surface and achieves higher precision testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AECC SHENYANG ENGINE RES INST
- Filing Date
- 2023-02-08
- Publication Date
- 2026-06-26
Smart Images
Figure CN116818255B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of air compressor rotary disks, and specifically relates to a test method for air resistance of air compressor rotary disks. Background Technology
[0002] The compressor rotor is a key component of aero-engines, and its temperature field plays a crucial role in the strength, lifespan, and deformation analysis of the rotor. With the continuous increase in compressor outlet temperature, compressors are gradually transitioning to hot-end components, experiencing greater thermal stress and decreasing temperature margins, thus increasing the urgency of accurately calculating the temperature field. To accurately obtain the temperature field of the compressor rotor, accurate quantitative calculations of its drag torque are essential. The drag torque determines the work done by the rotor on the airflow, thus determining the airflow's temperature rise along its path. This temperature rise is a necessary input condition for calculating the compressor rotor's temperature field. The accuracy of the drag torque calculation largely depends on experimental testing; the test results are crucial foundational data for correcting and calibrating the drag torque calculation model.
[0003] Traditional methods struggle to measure the drag torque on the compressor inlet disc surface. Typically, only calculated values can be obtained through three-dimensional numerical simulation, but the accuracy cannot be verified, and the degree of deviation is unknown. Experimental testing can only provide a comprehensive measurement of drag torque, including the total drag torque from unrelated surfaces. Given the relatively small drag torque value of the compressor inlet disc surface itself, the accuracy will significantly deviate if irrelevant surfaces, especially those rotating between static and dynamic systems, are included in the test.
[0004] Therefore, it is desirable to have a technical solution to overcome or at least mitigate one of the aforementioned defects of the prior art. Summary of the Invention
[0005] The purpose of this application is to provide a test method for air resistance of a compressor rotary disk, so as to solve at least one problem existing in the prior art.
[0006] The technical solution of this application is:
[0007] A method for testing the air resistance of a compressor rotary disk includes:
[0008] Step 1: Obtain different test specimens;
[0009] Step 2: Determine the air supply method. Under the corresponding air supply method, conduct wind resistance tests on each of the test pieces and measure the wind resistance torque including the surface of the rotating static system and / or the surface of the rotating rotating system.
[0010] Step 3: Calculate the wind resistance torque on the surface of the compressor intake disc cavity using the addition and subtraction elimination method.
[0011] In at least one embodiment of this application, step one, obtaining different test specimens, includes:
[0012] Obtain a first test piece, which includes an inner shaft, a compressor inlet plate, and a compressor wheel. One end of the compressor inlet plate is connected to the outer wall of the inner shaft, and the other end is connected to the compressor wheel.
[0013] In at least one embodiment of this application, step one, obtaining different test specimens, includes:
[0014] Obtain a second test piece, which includes an inner shaft and a compressor inlet disc, one end of which is connected to the outer wall of the inner shaft.
[0015] In at least one embodiment of this application, in step two, the gas supply method includes: supplying gas and not supplying gas;
[0016] In at least one embodiment of this application, step two, which involves conducting a wind resistance test on each of the test specimens under the corresponding air supply method and measuring the wind resistance torque including the surface of the rotating-stationary system and / or the surface of the rotating-rotating system, includes:
[0017] Under air supply conditions, the first test piece is subjected to a wind resistance test, and the first wind resistance torque A, including the inclined cone wall rotating static surface, the free disk rotating static surface, the internal channel rotating surface and the compressor inlet disk cavity surface, is measured.
[0018] Without air supply, a wind resistance test was conducted on the first test piece to measure the second wind resistance torque B, which includes the static surface of the inclined cone wall and the static surface of the free disc.
[0019] Under air supply conditions, the second test piece was subjected to a wind resistance test, and the third wind resistance torque C, including the inclined cone wall rotating surface, the internal channel rotating surface and the compressor intake plate cavity surface, was measured.
[0020] Without air supply, the second test piece was subjected to a wind resistance test, and the fourth wind resistance torque D, including the inclined cone wall static surface and the compressor intake plate cavity surface, was measured.
[0021] In at least one embodiment of this application, step three, which involves calculating the drag torque on the surface of the compressor intake disc cavity using the elimination method, includes:
[0022] Based on the first drag torque A, the second drag torque B, the third drag torque C, and the fourth drag torque D, the drag torque E on the surface of the compressor inlet disc cavity is calculated:
[0023] E = A + DBC.
[0024] The invention has at least the following beneficial technical effects:
[0025] The compressor rotary disk wind resistance test method of this application prepares different test pieces and conducts wind resistance tests on the test pieces under different air supply methods. Finally, the wind resistance torque of the compressor inlet disk cavity surface is obtained by the addition and subtraction elimination method. This solves the technical problem that traditional methods cannot measure the wind resistance of a specific surface alone. It has the significant advantages of more accurate testing and relatively lower cost. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of a typical compressor inlet disc cavity;
[0027] Figure 2 This is a schematic diagram of a gas supply test on a first test piece according to one embodiment of this application;
[0028] Figure 3 This is a schematic diagram of a non-gas supply test on the first test piece according to one embodiment of this application;
[0029] Figure 4 This is a schematic diagram of a gas supply test on a second test piece according to one embodiment of this application;
[0030] Figure 5 This is a schematic diagram of a non-gas supply test on a second test piece according to one embodiment of this application.
[0031] in:
[0032] 1-Inner shaft; 2-Compressor inlet disc; 3-Compressor wheel disc. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.
[0035] The following is in conjunction with the appendix Figures 1 to 5 This application will be described in further detail.
[0036] This application provides a test method for air resistance of a compressor rotary disk, including the following steps:
[0037] Step 1: Obtain different test specimens;
[0038] Step 2: Determine the air supply method. Under the corresponding air supply method, conduct wind resistance tests on each test piece and measure the wind resistance torque including the surface of the rotating static system and / or the surface of the rotating rotating system.
[0039] Step 3: Calculate the wind resistance torque on the surface of the compressor intake disc cavity using the addition and subtraction elimination method.
[0040] The test method for air resistance of the compressor rotary disk in this application is as follows: Figure 1 As shown, the compressor inlet disk cavity structure includes an inner shaft 1, a compressor inlet disk 2, and a compressor wheel 3. One end of the compressor inlet disk 2 is connected to the outer wall of the inner shaft 1, and the other end is connected to the compressor wheel 3. The front side of the compressor inlet disk 2 forms an inclined conical wall rotating surface, and the inside of the compressor inlet disk 2 forms an internal channel rotating surface. The inner shaft 1, the compressor inlet disk 2, and the compressor wheel 3 together form the compressor inlet disk cavity, and the surface of the compressor inlet disk cavity is the compressor inlet disk cavity surface.
[0041] First, two test pieces were fabricated based on the compressor inlet disc cavity structure. For example... Figure 2-3 As shown, the first test piece includes an inner shaft 1, a compressor inlet disc 2, and a compressor wheel disc 3. One end of the compressor inlet disc 2 is connected to the outer wall of the inner shaft 1, and the other end is connected to the compressor wheel disc 3; Figure 4-5 As shown, the second test piece includes an inner shaft 1 and a compressor inlet plate 2, with one end of the compressor inlet plate 2 connected to the outer wall of the inner shaft 1.
[0042] In a preferred embodiment of this application, the gas supply method is determined, including: supplying gas and not supplying gas. When gas is supplied, the same gas flow rate as when the compressor rotary disc is operating is applied.
[0043] Under the corresponding air supply method, wind resistance tests were conducted on the first and second test specimens, and the wind resistance torque, including the surface of the rotating-stationary system and / or the surface of the rotating-rotating system, was measured, specifically including:
[0044] like Figure 2 As shown, under air supply conditions, a wind resistance test was conducted on the first test piece, and the first wind resistance torque A was measured, including the inclined cone wall rotating static surface, the free disk rotating static surface, the internal channel rotating surface, and the compressor inlet disc cavity surface. The inclined cone wall rotating static surface and the free disk rotating static surface are rotating static system surfaces, while the internal channel rotating surface and the compressor inlet disc cavity surface are rotating rotating system surfaces. The first wind resistance torque A obtained under these conditions is a combined wind resistance torque from multiple surfaces, which, compared to the wind resistance torque to be determined from the compressor inlet disc cavity surface, is affected by interference from three additional surfaces: the inclined cone wall rotating static surface, the free disk rotating static surface, and the internal channel rotating surface.
[0045] like Figure 3 As shown, a wind resistance test was conducted on the first test piece without air supply, and the second wind resistance torque B, including the static surface of the inclined conical wall and the static surface of the free disk, was measured. Since the air supply was cancelled, the circumferential velocity of the airflow in the internal channel and the channel to be determined is basically the same as the rotational velocity of the turntable, and will not cause resistance to the rotation of the turntable; the wind resistance is close to zero. Therefore, under this condition, the second wind resistance torque B measured in the test is the sum of the wind resistance torques of the static surface of the inclined conical wall and the static surface of the free disk.
[0046] like Figure 4 As shown, under air supply conditions, a wind resistance test was conducted on the second test piece, and the third wind resistance torque C, including the rotating surface of the inclined cone wall, the rotating surface of the internal channel, and the surface of the compressor inlet disc cavity, was measured. Since the compressor disc 3 was eliminated, the measured third wind resistance torque C is the sum of the wind resistance torques of the rotating surface of the inclined cone wall, the rotating surface of the internal channel, and the surface of the compressor inlet disc cavity to be determined. It should be noted that at this time, the surface of the compressor inlet disc cavity has changed from a rotating system surface to a rotating stationary system surface, and the wind resistance torque will change and cannot be directly compared with the rotating system surface. Figure 2 The wind resistance torque is directly added, subtracted, or eliminated.
[0047] like Figure 5 As shown, under no-air-supply conditions, a wind resistance test was conducted on the second test piece, and the fourth wind resistance torque D, including the inclined conical wall rotating surface and the compressor inlet disc cavity surface, was measured. Since the air supply was cancelled, the circumferential velocity of the airflow within the internal channel is essentially the same as the rotational velocity of the turntable, causing no resistance to the turntable's rotation; the wind resistance is close to zero. Therefore, under these conditions, the measured fourth wind resistance torque D is the sum of the wind resistance torques of the inclined conical wall rotating surface and the compressor inlet disc cavity surface to be determined. It should be noted that the compressor inlet disc cavity surface at this time is also a rotating surface, capable of interacting with... Figure 4 The wind resistance torque is directly added, subtracted, or eliminated.
[0048] The compressor rotary disk wind resistance test method of this application, finally, calculates the wind resistance torque E of the compressor inlet disk cavity surface based on the first wind resistance torque A, the second wind resistance torque B, the third wind resistance torque C, and the fourth wind resistance torque D obtained above:
[0049] E = A + DBC
[0050] The drag torque of the compressor inlet disc surface under specific air supply flow and rotational speed is obtained through the above formula, which is the final test result. This formula comprehensively considers the effects of structure and swirl, allowing for the determination of the drag torque of the surface itself while ensuring elimination.
[0051] The compressor rotary disk wind resistance test method of this application comprehensively considers the effects of structure and swirl, and can accurately test the wind resistance torque on the surface of the compressor inlet disk cavity, thereby providing accurate input conditions for the calculation of the compressor rotary disk temperature field. This application solves the technical problem that traditional methods cannot measure the wind resistance of a specific surface alone, and has the significant advantages of more accurate testing and relatively lower cost.
[0052] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A method for testing the air resistance of a compressor rotary disk, characterized in that, include: Step 1: Obtain different test specimens; Step 2: Determine the air supply method. Under the corresponding air supply method, conduct wind resistance tests on each of the test pieces and measure the wind resistance torque including the static and / or rotating surfaces. Step 3: Calculate the drag torque on the surface of the compressor intake disc cavity using the addition and subtraction elimination method; In step one, obtaining different test specimens includes: Obtain a first test piece, which includes an inner shaft, a compressor inlet disc, and a compressor wheel disc. One end of the compressor inlet disc is connected to the outer wall of the inner shaft, and the other end is connected to the compressor wheel disc. In step one, obtaining different test specimens includes: Obtain a second test piece, which includes an inner shaft and a compressor inlet disc, one end of which is connected to the outer wall of the inner shaft; In step two, the gas supply method includes: supplying gas and not supplying gas; In step two, the wind resistance test is performed on each of the test pieces under the corresponding air supply mode, and the wind resistance torque including the surface of the rotating-stationary system and / or the surface of the rotating-rotating system is measured, including: Under air supply conditions, the first test piece is subjected to a wind resistance test, and the first wind resistance torque A, including the inclined cone wall rotating static surface, the free disk rotating static surface, the internal channel rotating surface and the compressor inlet disk cavity surface, is measured. Without air supply, a wind resistance test was conducted on the first test piece to measure the second wind resistance torque B, which includes the static surface of the inclined cone wall and the static surface of the free disc. Under air supply conditions, the second test piece was subjected to a wind resistance test, and the third wind resistance torque C, including the inclined cone wall rotating surface, the internal channel rotating surface and the compressor intake plate cavity surface, was measured. Without air supply, the second test piece was subjected to a wind resistance test, and the fourth wind resistance torque D, including the inclined cone wall static surface and the compressor inlet disc cavity surface, was measured. In step three, the calculation of the drag torque on the surface of the compressor intake disc cavity using the elimination method includes: Based on the first drag torque A, the second drag torque B, the third drag torque C, and the fourth drag torque D, the drag torque E on the surface of the compressor inlet disc cavity is calculated: E = A + DBC.