Sealing coating abrasion test device

Abstract

A sealing coating collision and abrasion testing device. The device comprises a heating device, a base, a rotating system, a feeding system, a protective system, a data acquisition system, a sample fixing system and a controller; the heating device, the rotating system, the feeding system, the protective system, the data acquisition system and the sample fixing system are mounted on the base; and the controller is electrically connected to the electrical components in the device. The sealing coating collision and abrasion testing device provided by the present invention has the following beneficial effects: the present invention can realistically simulate the collision and abrasion between the sealing coating and the blade under high-speed rotation under working conditions, study the collision and abrasion forces on the coating sample under different penetration depths, and measure the experimental parameters that can be used to analyze the performance of the coating. The overall structural layout is reasonable, the operation is convenient, and it can meet the needs of the experiment.

Description

Technical Field

[0001] The invention belongs to the technical field of aero-engine test systems, and in particular relates to an experimental mechanism for simulating and analyzing the influence of coatings on blade collision and wear. Background Art

[0002] Increasing the radial clearance of an aircraft engine's turbine increases the engine's specific fuel consumption; conversely, decreasing the radial clearance improves the engine's turbine efficiency. Furthermore, reducing the radial clearance of the compressor can enhance the engine's surge resistance, thereby improving flight safety. As a key engine technology, sealing coatings can improve the seal between rotating and stationary components in aircraft gas turbines, significantly enhancing engine performance. Applying sealing coatings to the turbine and compressor casings to seal gas passages reduces gaps and improves thermal efficiency. Sealing coatings are already widely used in the aviation sector. Ideal sealing coatings require strong thermal stability, a low friction coefficient, and strong oxidation resistance. When used to seal between blade tips and casings, they must effectively prevent scratching and damage while maintaining a minimum clearance, achieving a good seal.

[0003] However, in actual use, high-speed scraping and rubbing between the blades and the sealing coating often occur, causing continuous and severe vibration of the blades. This can lead to more serious problems such as blade breakage and scrapping, shaft bending, and severe vibration of the entire engine. This seriously threatens the operating safety of the engine and also affects its efficiency. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a sealing coating abrasion testing device.

[0005] In order to achieve the above-mentioned object, the sealing coating abrasion testing device provided by the present invention includes a heating device, a base, a rotation system, a feeding system, a protection system, a data acquisition system, a sample fixing system and a controller;

[0006] The feed system includes a horizontal screw guide rail, a connecting piece, a fixed bracket, a vertical screw guide rail, a vertical servo motor and a horizontal servo motor; the lower end of the vertical screw guide rail is fixed to one side of the top surface of the base, and is driven by the vertical servo motor to move up and down; the fixed bracket is concave in shape, arranged horizontally, and the side opposite to the opening is fixed to the vertical screw guide rail; the two horizontal screw guide rails are respectively installed on the inner surfaces of the two side surfaces adjacent to the opening of the fixed bracket, and are respectively driven by a horizontal servo motor to move left and right; the two ends of the connecting piece are respectively connected to the two horizontal screw guide rails;

[0007] The rotating system includes a rotating shaft, a power head, a motor, a disc, and blades. The output end of the motor is located at the lower end and is connected to the upper end of the rotating shaft through the core shaft on the power head. The outer shell of the power head is connected to the middle part of the connecting piece. The disc is installed at the lower end of the rotating shaft. Multiple blades are installed on the outer edge of the disc.

[0008] The data acquisition system includes a mechanical sensor and a temperature sensor; wherein the mechanical sensor is installed in the middle of the top surface of the base;

[0009] The protection system includes a base plate, a left protective cover, a right protective cover and an annular baffle; the middle portion of the bottom surface of the base plate is fixed to the mechanical sensor; the lower end of the annular baffle is fixed to the middle portion of the top surface of the base plate, and a notch is formed on one circumferential surface for setting the coating sample, and the position of the notch is farthest from the position of the vertical screw guide rail; the left protective cover and the right protective cover are both semicircular and are detachably mounted at the upper end of the annular baffle, and a semicircular hole is formed at the center of each of the left and right protective covers, and the two semicircular holes form a circular hole for passing through the rotating shaft;

[0010] The heating device is installed on the left protective cover and is used to heat the coating sample;

[0011] The sample fixing system includes a pad, a pressure plate, and a pressure plate bolt; the pad is a wedge-shaped block, the lower end of which is fixed to the top surface of the base plate outside the notch on the annular baffle; the two ends of the pressure plate are respectively placed on the inclined surface of the pad and the upper end of the coating sample, and a bolt through-hole is formed in the middle; the lower end of the pressure plate bolt passes through the bolt through-hole on the pressure plate and is threadedly connected to the base plate, thereby fixing the coating sample; the temperature sensor 3 is arranged on the top surface of the base plate and contacts the outer side surface of the coating sample;

[0012] The controller is electrically connected to the mechanical sensor, the temperature sensor, the heating device, the motor, the vertical servo motor and the horizontal servo motor respectively.

[0013] The heating device adopts a flame gun.

[0014] The mechanical sensor adopts a three-component dynamometer, which is used to measure the three orthogonal components of the friction force generated during the friction.

[0015] The temperature sensor is an infrared sensor, which is used to measure the temperature of the coating sample 5 .

[0016] The left side protective cover, the right side protective cover and the annular baffle are connected by bolts.

[0017] The controller adopts a PLC controller.

[0018] The sealing coating abrasion testing device provided by the present invention has the following beneficial effects: it can realistically simulate the abrasion between the sealing coating and the blade under high-speed rotation under working conditions, study the abrasion forces experienced by coating samples at different penetration depths, and measure experimental parameters for analyzing coating performance. The overall structure is rationally arranged and easy to operate, meeting experimental requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structural diagram of the sealing coating abrasion testing device provided by the present invention.

[0020] Figure 2 A diagram of the protection system of the sealing coating abrasion testing device provided by the present invention.

[0021] Figure 3 Diagram of the motor and feed system of the sealing coating abrasion testing device provided by the present invention. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are further explained below with reference to the accompanying drawings and specific examples.

[0023] like Figure 1-Figure 3 As shown, the sealing coating abrasion testing device provided by the present invention includes a heating device 8, a base 21, a rotation system, a feeding system, a protection system, a data acquisition system, a sample fixing system and a controller;

[0024] The feed system includes a horizontal screw guide rail 11, a connecting member 14, a fixed bracket 15, a vertical screw guide rail 16, a vertical servo motor and a horizontal servo motor; the lower end of the vertical screw guide rail 16 is fixed to one side of the top surface of the base 21 and is driven by the vertical servo motor to move up and down; the fixed bracket 15 is concave in shape, arranged horizontally, and the side opposite to the opening is fixed to the vertical screw guide rail 16; the two horizontal screw guide rails 11 are respectively mounted on the inner surfaces of the two side surfaces adjacent to the opening of the fixed bracket 15, and are respectively driven by a horizontal servo motor to move left and right; the two ends of the connecting member 14 are respectively connected to the two horizontal screw guide rails 11;

[0025] The rotating system includes a rotating shaft 10, a power head 12, a motor 13, a disc 17, and blades 19. The output end of the motor 13 is located at the lower end and is connected to the upper end of the rotating shaft 10 through the core shaft on the power head 12. The outer shell of the power head 12 is connected to the middle of the connecting member 14. The disc 17 is installed at the lower end of the rotating shaft 10. A plurality of blades 19 are installed on the outer edge of the disc 17.

[0026] The data acquisition system includes a mechanical sensor 1 and a temperature sensor 3; wherein the mechanical sensor 1 is installed in the middle of the top surface of the base 21;

[0027] The protection system includes a base plate 2, a left protective cover 9, a right protective cover 18, and an annular baffle 20; the middle portion of the bottom surface of the base plate 2 is fixed to the mechanical sensor 1; the lower end of the annular baffle 20 is fixed to the middle portion of the top surface of the base plate 2, and a notch is formed on one side of the circumference for arranging the coating sample 5, and the position of the notch is farthest from the position of the vertical screw guide 16; the left protective cover 9 and the right protective cover 18 are both semicircular and are detachably mounted at the upper end of the annular baffle 20, and a semicircular hole is formed at the center of each of the left protective cover 9 and the right protective cover 18, and the two semicircular holes form a circular hole for passing through the rotating shaft 10;

[0028] The heating device 8 is installed on the left protective cover 9 and is used to heat the coating sample 5;

[0029] The sample fixing system includes a pad 4, a pressure plate 6, and a pressure plate bolt 7; the pad 4 is a wedge-shaped block, the lower end of which is fixed to the top surface of the base plate 2, outside the notch on the annular baffle 20; the two ends of the pressure plate 6 are respectively placed on the inclined surface of the pad 4 and the upper end of the coating sample 5, and a bolt through hole is formed in the middle; the lower end of the pressure plate bolt 7 passes through the bolt through hole in the pressure plate 6 and is threadedly connected to the base plate 2, thereby fixing the coating sample 5; the temperature sensor 3 is arranged on the top surface of the base plate 2 and contacts the outer side surface of the coating sample 5;

[0030] The controller is electrically connected to the mechanical sensor 1 , the temperature sensor 3 , the heating device 8 , the motor 13 , the vertical servo motor and the horizontal servo motor respectively.

[0031] The heating device 8 is a flame gun.

[0032] The mechanical sensor 1 adopts a three-component dynamometer, which is used to measure the three orthogonal components of the friction force generated during friction.

[0033] The temperature sensor 3 is an infrared sensor, which is used to measure the temperature of the coating sample 5 .

[0034] The left protective cover 9 , the right protective cover 18 and the annular baffle 20 are connected by bolts.

[0035] The controller adopts a PLC controller.

[0036] The method for using the sealing coating abrasion test device provided by the present invention is now described as follows:

[0037] When the sealing coating abrasion test device provided by the present invention is used to perform a coating abrasion test, the tester first removes the left protective cover 9 and the right protective cover 18, places the coating sample 5 in the notch on the annular baffle 20, and then places the two ends of the pressure plate 6 on the inclined surface of the pad 4 and the upper end of the coating sample 5 respectively. Then, the lower end of the pressure plate bolt 7 is passed through the bolt through hole on the pressure plate 6 and is screwed to the bottom plate 2, thereby fixing the coating sample 5;

[0038] Under the control of the controller, the horizontal servo motor is used to move the rotating shaft 10, motor 13, disc 17 and blade 19 together to the top of the annular baffle 20 through the horizontal screw guide 11, connector 14 and power head 12. Then, the vertical servo motor is used to lower the fixing bracket 15 together with the components connected thereto through the vertical screw guide 16 until the center point of the blade 19 is aligned with the center point of the annular baffle 20. The left protective cover 9 and the right protective cover 18 are covered on the upper end of the annular baffle 20 and the bolts are tightened. At this time, the circular hole formed by the two semicircular holes on the left protective cover 9 and the right protective cover 18 will surround the outer side of the lower part of the rotating shaft 10.

[0039] The heating device 8 is then turned on to heat the sample. After the temperature sensor 3 detects that the temperature inside the annular baffle 20 has reached the set temperature, the motor 13 is turned on to rotate the blade 19 until it reaches the target speed and then maintains it. The horizontal servo motor then moves the horizontal screw guide 11 and its connected components toward the coating sample 5, causing the blade 19 to invade the coating sample 5 and cause friction. During this process, the friction force generated by the friction is detected by the mechanical sensor 1, and the temperature sensor 3 detects the temperature of the coating sample 5 and transmits it to the controller for subsequent test analysis. After the test is completed, the horizontal servo motor retracts the blade 19, and the device is closed. The coating sample 5 is removed, weighed, and the coating surface quality is observed and analyzed.

[0040] The present invention only describes the implementation methods of the embodiments to help understand the methods and central ideas of the present invention. Without departing from the scope of the present invention, the specific applications of this application may vary, and the content of this specification should not be understood as limiting the present invention.

Claims

1. A sealing coating abrasion testing device, characterized by: The sealing coating abrasion testing device comprises a heating device (8), a base (21), a rotation system, a feeding system, a protection system, a data acquisition system, a sample fixing system and a controller; The feeding system comprises a horizontal screw guide rail (11), a connecting member (14), a fixed bracket (15), a vertical screw guide rail (16), a vertical servo motor and a horizontal servo motor; wherein the lower end of the vertical screw guide rail (16) is fixed to one side of the top surface of the base (21), and is driven by the vertical servo motor to move up and down; the fixed bracket (15) is concave in shape, arranged horizontally, and the side opposite to the opening is fixed on the vertical screw guide rail (16); the two horizontal screw guide rails (11) are respectively installed on the inner surfaces of the two side surfaces adjacent to the opening on the fixed bracket (15), and are respectively driven by a horizontal servo motor to move left and right; the two ends of the connecting member (14) are respectively connected to the two horizontal screw guide rails (11); The rotating system comprises a rotating shaft (10), a power head (12), a motor (13), a disc (17) and blades (19); the output end of the motor (13) is located at the lower end and is connected to the upper end of the rotating shaft (10) through a core shaft on the power head (12); the outer shell of the power head (12) is connected to the middle part of the connecting member (14); the disc (17) is installed at the lower end of the rotating shaft (10); and a plurality of blades (19) are installed at the outer edge of the disc (17); The data acquisition system includes a mechanical sensor (1) and a temperature sensor (3); wherein the mechanical sensor (1) is installed in the middle of the top surface of the base (21); The protection system comprises a base plate (2), a left protective cover (9), a right protective cover (18) and an annular baffle (20); the middle of the bottom surface of the base plate (2) is fixed on the mechanical sensor (1); the lower end of the annular baffle (20) is fixed to the middle of the top surface of the base plate (2), and a notch for arranging a coating sample (5) is formed on one side of the circumferential surface, and the position of the notch is farthest from the position of the vertical screw guide rail (16); the left protective cover (9) and the right protective cover (18) are both semicircular and are detachably mounted at the upper end of the annular baffle (20), and a semicircular hole is formed at the center of each of the left protective cover (9) and the right protective cover (18), and the two semicircular holes form a circular hole for passing through the rotating shaft (10); The heating device (8) is installed on the left protective cover (9) and is used to heat the coating sample (5); The sample fixing system includes a pad (4), a pressure plate (6) and a pressure plate bolt (7); the pad (4) is a wedge-shaped block, the lower end of which is fixed to the top surface of the bottom plate (2) at a position outside the notch on the annular baffle (20); the two ends of the pressure plate (6) are respectively placed on the inclined surface of the pad (4) and the upper end of the coating sample (5), and a bolt through hole is formed in the middle; the lower end of the pressure plate bolt (7) passes through the bolt through hole on the pressure plate (6) and is threadedly connected to the bottom plate (2), thereby fixing the coating sample (5); the temperature sensor (3) is arranged on the top surface of the bottom plate (2) and contacts the outer side surface of the coating sample (5); The controller is electrically connected to the mechanical sensor (1), the temperature sensor (3), the heating device (8), the motor (13), the vertical servo motor and the horizontal servo motor respectively.

2. The sealing coating abrasion testing device according to claim 1, characterized in that: The heating device (8) adopts a flame gun.

3. The sealing coating abrasion testing device according to claim 1, characterized in that: The mechanical sensor (1) adopts a three-component dynamometer and is used to measure the three orthogonal components of the friction force generated during friction.

4. The sealing coating abrasion testing device according to claim 1, characterized in that: The temperature sensor (3) is an infrared sensor and is used to measure the temperature of the coating sample (5).

5. The sealing coating abrasion testing device according to claim 1, characterized in that: The left side protective cover (9), the right side protective cover (18) and the annular baffle (20) are connected by bolts.

6. The sealing coating abrasion testing device according to claim 1, characterized in that: The controller adopts a PLC controller.

Images