Nozzle wear test device

Abstract

The invention discloses a nozzle wear experiment device, and the device comprises a housing which is provided with an installation cavity and is internally provided with a detection station; the driving end of the driving assembly extends into a detection station in the mounting cavity, and the driving end is used for mounting a to-be-detected nozzle and driving the to-be-detected nozzle to rotate; comprising a friction rod and a pressurizing part, the friction rod is provided with a friction end and a pressurizing end, the friction end extends into the detection station in the mounting cavity and is used for being in contact with the outer surface of the to-be-detected nozzle on the driving end, and the pressurizing part is used for applying pressure to the pressurizing end; and the heating assembly is used for heating the mounting cavity. According to the abrasion test group device, the driving motor and the friction rod are arranged, so that friction is generated between the to-be-detected nozzle and the friction rod, the abrasion process of the to-be-detected nozzle in the unit is simulated, the pressurizing piece is arranged to increase the friction force between the to-be-detected nozzle and the friction rod, and the heating assembly is arranged to heat the environment where the to-be-detected nozzle is located; and the effect of accelerating abrasion can be achieved, so that the time of an abrasion experiment can be shortened.

Description

Technical Field

[0001] The present application relates to the field of gas turbines, and in particular to a nozzle wear test device. Background Art

[0002] At present, the nozzle wear detection of gas turbines is generally carried out in field units. However, the wear of gas turbine nozzles is a continuous and slow process. Field units cannot directly detect the wear process after long-term operation. If the wear process of the nozzles after long-term operation is to be detected, they can only be disassembled and inspected at regular intervals. However, the detection of nozzle wear process by regular disassembly and inspection is relatively complicated. Summary of the Invention

[0003] The present application proposes a nozzle wear test device, which aims to solve the problem in the prior art that when testing the wear process of a gas turbine nozzle after long-term operation, it is relatively complicated to perform testing by regular disassembly and inspection.

[0004] In an embodiment of the present application, a nozzle wear test device is proposed, comprising:

[0005] A housing, wherein the housing has an installation cavity therein, and a detection station is provided in the installation cavity;

[0006] A driving assembly, wherein a driving end of the driving assembly extends into the detection station in the installation cavity, the driving end is used to install the nozzle to be detected, and the driving assembly is used to drive the nozzle to be detected to rotate;

[0007] a friction assembly, the friction assembly comprising a friction rod and a pressure member, the friction rod having a friction end and a pressure end, the friction end extending into the detection station in the mounting cavity and configured to contact the outer surface of the nozzle to be detected on the driving end, the pressure member being disposed at the pressure end and configured to apply pressure to the pressure end;

[0008] A heating component is used to heat the installation cavity.

[0009] In an embodiment of the present application, the driving assembly includes a rotating shaft and a driving motor. The outer wall of the shell is provided with a first mounting hole. One end of the rotating shaft passes through the first mounting hole and extends into the detection station. The other end of the rotating shaft is provided on the outside of the shell. The driving shaft of the driving motor is fixedly connected to the end of the rotating shaft provided on the outside of the shell.

[0010] In an embodiment of the present application, the first mounting hole is further provided with a bearing seat, a bearing is provided in the bearing seat, and the rotating shaft is provided in the bearing.

[0011] In an embodiment of the present application, the shell is provided with a second mounting hole, the friction end extends into the detection station in the mounting cavity through the second mounting hole, and the extension direction of the friction rod is perpendicular to the direction of the driving end of the driving assembly.

[0012] In an embodiment of the present application, a fixing assembly is further included, wherein the fixing assembly is provided with a guide rail, the fixing assembly is arranged at the second mounting hole, and the friction rod is at least partially arranged in the guide rail.

[0013] In an embodiment of the present application, the second mounting hole is provided on the top surface of the shell, the friction rod extends vertically downward, and the pressure member includes a bearing platform, which is provided on the pressure end and is used to bear a load.

[0014] In an embodiment of the present application, the shell is provided with a third mounting hole, and the heating assembly includes a heating rod, which is arranged in the mounting cavity through the third mounting hole.

[0015] In an embodiment of the present application, the shell is further provided with a fourth mounting hole, and an air guide pipe is provided on the outside of the shell.

[0016] In an embodiment of the present application, the shell is further provided with a fifth mounting hole, and the fifth mounting hole is provided with a glass window.

[0017] In an embodiment of the present application, the device further includes a base, the base is provided with a mounting platform, and the housing and the drive assembly are both provided on the mounting platform.

[0018] The wear test group device in the embodiment of the present application is equipped with a drive motor and a friction rod so that sliding friction can be generated between the nozzle to be tested and the friction rod to simulate the wear process of the nozzle to be tested in the gas turbine unit. The friction between the nozzle to be tested and the friction rod is increased by arranging a pressure member, and the environment in which the nozzle to be tested is heated by arranging a heating component, both of which can accelerate the wear, thereby shortening the time of the wear test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of the structure of the nozzle wear test device in one embodiment of the present application;

[0021] Figure 2 This is a structural schematic diagram of the nozzle wear test device in one embodiment of the present application from another perspective.

[0022] Description of reference numerals:

[0023] 1-air guide tube, 2-base, 3-shell, 31-mounting cavity, 4-nozzle to be detected, 5-carrying platform, 6-friction rod 6, 7-fixing assembly, 71-guide rail, 8-bearing seat, 9-rotating shaft, 10-fixing key, 11-drive motor, 12-bearing, 13-fixing bolt, 14-heating rod, 15-glass window, 16-glass cover, 17-camera, 18-second mounting hole, 19-third mounting hole, 20-fourth mounting hole, 21-fifth mounting hole.

[0024] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0028] like Figure 1 、 Figure 2 As shown, the embodiment of the present application proposes a nozzle wear test device, comprising:

[0029] The housing 3 has an installation cavity 31 therein, and a detection station is provided in the installation cavity 31;

[0030] A driving assembly, wherein the driving end of the driving assembly extends into the detection station in the installation cavity 31, the driving end is used to install the nozzle 4 to be detected, and the driving assembly is used to drive the nozzle 4 to be detected to rotate;

[0031] A friction assembly, comprising a friction rod 6 and a pressure member, wherein the friction rod 6 has a friction end and a pressure end, wherein the friction end extends into the detection station in the mounting cavity 31 and is used to contact the outer surface of the nozzle 4 to be detected on the driving end, and the pressure member is provided at the pressure end and is used to apply pressure to the pressure end;

[0032] A heating component is used to heat the installation cavity 31 .

[0033] Reference Figure 1 、 Figure 2 In the embodiment of the present application, the interior of the shell 3 is hollow to form an installation cavity 31. The hollow installation cavity 31 has a detection station, and the nozzle 4 to be detected is set on the detection station for wear detection.

[0034] The nozzle 4 to be tested can be fixed at the testing station by a driving assembly, for example, Figure 1 As shown, in the embodiment of the present application, the driving assembly includes a rotating shaft 9 and a driving motor 11. The outer wall of the shell 3 is provided with a first mounting hole. One end of the rotating shaft 9 passes through the first mounting hole and extends into the detection station. The other end of the rotating shaft 9 is provided on the outside of the shell 3. The driving shaft of the driving motor 11 is fixedly connected to the end of the rotating shaft 9 provided on the outside of the shell 3.

[0035] In the embodiment of the present application, the housing 3 is roughly in the shape of a rectangular parallelepiped, and the drive motor 11 is arranged outside the housing 3. After the drive shaft of the drive motor 11 is connected to the rotating shaft 9, the rotating shaft 9 is extended into the installation cavity 31 and faces the detection station. The nozzle 4 to be detected can be installed on the end of the rotating shaft 9 facing the detection station. At this time, the nozzle 4 to be detected can be fixed in the detection station. Specifically, a first mounting hole can be provided on the side wall of the housing 3 near the drive motor 11. The end of the rotating shaft 9 located on the outside can be fixed to the drive shaft of the drive motor 11 by a fixing key 10. The other end of the rotating shaft 9 can pass through the first mounting hole and extend into the detection station. The end of the rotating shaft 9 extending into the detection station can also be provided with a fixing hole for installing the nozzle 4 to be detected, thereby fixing the nozzle 4 to be detected to the end of the rotating shaft 9 located in the detection station. When the drive motor 11 is working, the transmission shaft drives the rotating shaft 9 to rotate, so that the nozzle 4 to be detected can also rotate synchronously.

[0036] like Figure 1 As shown, in the embodiment of the present application, in order to ensure the stability of the nozzle 4 to be detected during rotation, a bearing seat 8 can be further provided in the first mounting hole, and a bearing 12 can be provided in the bearing seat 8, and a rotating shaft 9 can be provided in the bearing 12, so as to ensure that the rotating shaft 9 rotates stably, and thus the nozzle 4 to be detected on the rotating shaft 9 can also rotate stably.

[0037] In addition, the friction end of the friction rod 6 contacts the outer surface of the nozzle to be tested 4. Then, during the rotation of the nozzle to be tested 4, it will continue to rub against the friction end of the friction rod 6, thereby simulating the wear process of the nozzle to be tested 4 in the gas turbine unit.

[0038] like Figure 1 、 Figure 2 As shown, in the embodiment of the present application, the shell 3 is provided with a second mounting hole 18, the friction end extends into the detection station in the mounting cavity 31 through the second mounting hole 18, and the extension direction of the friction rod 6 is perpendicular to the direction of the driving end of the driving assembly.

[0039] Among them, Figure 1 、 Figure 2 In the shown orientation, the friction rod 6 extends vertically downward from the top of the shell 3 to the detection station in the installation cavity 31, and the rotating shaft 9 extends horizontally into the detection station. After the nozzle 4 to be detected is installed on the rotating shaft 9, it is coaxial with the rotating shaft 9, so that the friction end of the friction rod 6 is perpendicular to the axial direction of the nozzle 4 to be detected. The friction end contacts the nozzle 4 to be detected, so that when the nozzle 4 to be detected rotates, friction is generated between the friction end and the nozzle 4 to be detected, thereby simulating the wear process of the nozzle 4 to be detected in the gas turbine unit.

[0040] In addition, it should be noted that in addition to being able to extend vertically downward into the detection station and be perpendicular to the axial direction of the nozzle 4 to be detected, the friction rod 6 can also be extended horizontally into the detection station and be perpendicular to the axial direction of the nozzle 4 to be detected, or it can be extended into the detection station at an angle and be perpendicular to the axial direction of the nozzle 4 to be detected.

[0041] In addition, if Figure 2 As shown, in the embodiment of the present application, the outer surface of the nozzle to be detected 4 is an arc surface. Therefore, the end face of the friction end of the friction rod 6 can also be set to an arc surface that imitates the outer surface of the nozzle to be detected 4, so that the friction end of the friction rod 6 can be in good contact with the outer surface of the nozzle to be detected 4.

[0042] like Figure 1 、 Figure 2As shown, in the embodiment of the present application, a fixing component 7 is further included. The fixing component 7 is provided with a guide rail. The fixing component 7 is arranged at the second mounting hole 18, and the friction rod 6 is at least partially arranged in the guide rail.

[0043] The fixing assembly 7 is arranged at the second mounting hole 18, for example, it can be located at the position where the second mounting hole 18 is located outside the housing 3, or it can be located at the position where the second mounting hole 18 is located inside the housing 3, such as Figure 1 As shown, in Figure 1 In the orientation shown, the fixing assembly 7 is located at the position where the second mounting hole 18 is located in the housing 3. In addition, a guide rail is provided on the fixing assembly 7, and the extension direction of the guide rail is consistent with the extension direction of the friction rod 6. Figure 1 In the orientation shown, the friction rod 6 first passes through the second mounting hole 18, then passes through the guide rail, and finally faces the detection station. In the axial direction of the friction rod 6, the friction rod 6 can move in the guide rail, and in the circumferential direction of the friction rod 6, the guide rail can fix the friction rod 6, thereby preventing the friction rod 6 from deviating from the nozzle 4 to be detected during the experiment.

[0044] In addition, in the embodiment of the present application, the fixing component 7 can be an integrally formed hollow tube, the inner diameter of the hollow tube is roughly equivalent to the outer diameter of the friction rod 6, or slightly larger than the outer diameter of the friction rod 6; or, the fixing component 7 can also be two groove-shaped parts with a semicircular cross-section, which are spliced ​​together to form a hollow tube, and the inner diameter of the spliced ​​hollow tube is roughly equivalent to the outer diameter of the friction rod 6, or slightly larger than the outer diameter of the friction rod 6.

[0045] In the embodiments of this application, Figure 1 、 Figure 2 As shown, the second mounting hole 18 is provided on the top surface of the housing 3, the friction rod 6 extends vertically downward, and the pressurizing member includes a load-bearing platform 5, which is provided on the pressurizing end and is used to support a load. The second mounting hole 18 is provided on the top surface of the housing 3, and the friction rod 6 extends vertically downward into the testing station within the mounting cavity 31. The load-bearing platform 5 is provided on the pressurizing end of the friction rod 6 located outside the housing 3. Under the action of the load-bearing platform 5's own gravity, the pressure between the friction end of the friction rod 6 and the nozzle 4 to be tested increases, thereby increasing the friction between the friction end and the nozzle 4 to be tested, thereby shortening the test time. Furthermore, during use, the friction between the friction rod 6 and the nozzle 4 to be tested can be easily adjusted as needed. For example, to increase the friction, the weight of the load-bearing platform 5 can be increased, or the weight of the load on the load-bearing platform 5 can be increased. To decrease the friction, the weight of the load-bearing platform 5 can be reduced, or the weight of the load on the load can be reduced.

[0046] like Figure 2 As shown, in the embodiment of the present application, the housing 3 is provided with a third mounting hole 19, and the heating assembly includes a heating rod 14, which is disposed within the mounting cavity 31 through the third mounting hole 19. By providing the third mounting hole 19, the heating rod 14 is disposed within the mounting cavity 31 through the third mounting hole 19, heating the gas within the mounting cavity 31, simulating the working environment of the nozzle 4 to be tested within the gas turbine unit, thereby improving the accuracy of the wear test. In addition, the heating rod 14 can also be used to adjust the temperature within the mounting cavity 31, thereby accelerating the wear effect, and the wear resistance of the nozzle 4 to be tested can be verified in a short time.

[0047] In the embodiment of the present application, the wear rate of the wear test device during operation can be calculated based on the following formula (1):

[0048]

[0049] Where k is the dimensionless wear coefficient, p m is the contact pressure between the friction rod and the nozzle to be tested, is the relative sliding speed between the friction rod and the nozzle to be tested, n is the surface normal, H is the hardness of the nozzle to be tested, is the wear rate.

[0050] In the embodiment of the present application, the contact pressure between the friction rod and the nozzle to be detected can be calculated by the following formula (2):

[0051]

[0052] Wherein, F is the pressure applied by the friction rod to the nozzle to be detected, and A is the contact area between the friction rod and the nozzle to be detected.

[0053] In the embodiment of the present application, F can be calculated based on the gravity of the pressure member and the gravity of the friction rod itself.

[0054] In the embodiment of the present application, the relative sliding speed between the friction rod and the nozzle to be detected can be calculated based on the following formula (3):

[0055]

[0056] Wherein, w is the rotation speed of the nozzle to be detected, and r is the radius of the nozzle to be detected.

[0057] In addition, high temperature will cause the material to soften, the hardness H to decrease, and the wear coefficient K to increase at the same time. When the hardness decreases and the wear coefficient increases, the wear rate increases. Therefore, in the embodiments of the present application, the phenomenon of changes in wear rate caused by temperature changes is also considered.

[0058] For example, in the embodiment of the present application, the temperature can be introduced to correct the above formula (1), for example:

[0059]

[0060] Among them, k(T) and H(T) are temperature functions and can be calibrated experimentally. For example, through finite element simulation or experiment, the coupling relationship between temperature field and wear is established, the local temperature rise caused by frictional heat is calculated, and then k and H are dynamically adjusted according to the temperature distribution to obtain

[0061] Based on the above formulas (1), (2), (3), and (4), the wear rate of the nozzle to be tested can be calculated. Moreover, by adjusting and increasing the contact pressure between the friction rod and the nozzle to be tested, the relative sliding speed between the friction rod and the nozzle to be tested, and the temperature, the wear rate can be increased accordingly, thereby shortening the detection time.

[0062] like Figure 2 As shown, in the embodiment of the present application, the housing 3 is further provided with a fourth mounting hole 20, and an air duct 1 is provided on the outside of the housing 3. By providing the fourth mounting hole 20 and the air duct 1, after the heating rod 14 heats the air inside the mounting cavity 31, the heated air can be discharged from the fourth mounting hole 20 and the air duct 1.

[0063] like Figure 2 As shown, in the embodiment of the present application, the housing 3 is further provided with a fifth mounting hole 21, and the fifth mounting hole 21 is provided with a glass window 15. By providing the fifth mounting hole 21 and the glass window 15 in the fifth mounting hole 21, a worker can observe the wear condition of the nozzle 4 to be inspected in the housing 3 through the glass window 15.

[0064] In addition, a glass cover 16 may be provided on the outside of the glass window 15 . The glass cover 16 covers the glass window 15 . When not in use, the glass cover 16 covers the glass window 15 to protect the glass window 15 .

[0065] like Figure 2 As shown, in this embodiment of the present application, a camera 17 is further included, and the camera 17 is used to photograph the nozzle 4 to be inspected at the inspection station through the glass window 15. In this embodiment of the present application, the camera 17 is provided to capture images or record videos of the wear process of the nozzle 4 to be inspected through the glass window 15, which can be used for subsequent analysis of the wear condition of the nozzle 4 to be inspected.

[0066] like Figure 1 、 Figure 2As shown, in the embodiment of the present application, a base 2 is further included, and the base 2 is provided with a mounting platform, and the housing 3 and the drive assembly are both provided on the mounting platform. The housing 3 and the drive assembly can be fixed to the mounting platform using fixing bolts 13. Placing the drive assembly and the housing 3 on the same mounting platform is conducive to ensuring the stability of the entire wear test device during operation.

[0067] The wear test group device in the embodiment of the present application generates sliding friction between the nozzle to be tested 4 and the friction rod 6 by setting a drive motor 11 and a friction rod 6, simulating the wear process of the nozzle to be tested 4 in the gas turbine unit. The friction between the nozzle to be tested 4 and the friction rod 6 is increased by setting a pressure member, and the environment of the nozzle to be tested 4 is heated by setting a heating component, which can accelerate the wear and shorten the time of the wear test.

[0068] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A nozzle wear test device, characterized in that: include: A housing, wherein the housing has an installation cavity therein, and a detection station is provided in the installation cavity; A driving assembly, wherein a driving end of the driving assembly extends into the detection station in the installation cavity, the driving end is used to install the nozzle to be detected, and the driving assembly is used to drive the nozzle to be detected to rotate; a friction assembly, the friction assembly comprising a friction rod and a pressure member, the friction rod having a friction end and a pressure end, the friction end extending into the detection station in the mounting cavity and configured to contact the outer surface of the nozzle to be detected on the driving end, the pressure member being disposed at the pressure end and configured to apply pressure to the pressure end; A heating component is used to heat the installation cavity.

2. The nozzle wear test device according to claim 1, characterized in that: The driving assembly includes a rotating shaft and a driving motor. A first mounting hole is provided on the outer wall of the shell. One end of the rotating shaft passes through the first mounting hole and extends into the detection station. The other end of the rotating shaft is provided on the outside of the shell. The driving shaft of the driving motor is fixedly connected to the end of the rotating shaft provided on the outside of the shell.

3. The nozzle wear test device according to claim 2, characterized in that: The first mounting hole is further provided with a bearing seat, a bearing is provided in the bearing seat, and the rotating shaft is provided in the bearing.

4. The nozzle wear test device according to claim 1, characterized in that: The housing is provided with a second mounting hole, the friction end extends into the detection station in the mounting cavity through the second mounting hole, and the extension direction of the friction rod is perpendicular to the direction of the driving end of the driving assembly.

5. The nozzle wear test device according to claim 4, characterized in that: It also includes a fixing component, which is provided with a guide rail. The fixing component is arranged at the second mounting hole, and the friction rod is at least partially arranged in the guide rail.

6. The nozzle wear test device according to claim 5, characterized in that: The second mounting hole is provided on the top surface of the shell, the friction rod extends vertically downward, and the pressure member includes a bearing platform, which is provided on the pressure end and is used to bear a load.

7. The nozzle wear test device according to claim 1, characterized in that: The shell is provided with a third mounting hole, and the heating assembly includes a heating rod, which is arranged in the mounting cavity through the third mounting hole.

8. The nozzle wear test device according to claim 1, characterized in that: The shell is further provided with a fourth mounting hole, and an air guide pipe is provided on the outside of the shell.

9. The nozzle wear test device according to claim 1, characterized in that: The shell is further provided with a fifth mounting hole, and the fifth mounting hole is provided with a glass window.

10. The nozzle wear test device according to claim 1, characterized in that: It also includes a base, which is provided with a mounting platform, and the shell and the drive assembly are both arranged on the mounting platform.

Images