Device and method for measuring installation eccentricity of rub-impact casing

Abstract

The invention provides a rub-impact casing installation eccentricity measuring device and method, and the device comprises the steps: one end of a first measuring device is fixed to a casing, the other end of the first measuring device is provided with a first wedge block, and the upper end face of the first measuring device is provided with a first inclined plane; one end of the second measuring device is fixed to the casing, the other end of the second measuring device is provided with a movable wedge block which is slidably arranged on the guide rail, the lower end surface of the movable wedge block is provided with a second inclined surface, and the first inclined surface and the second inclined surface are matched with each other; one end of the third measuring device is fixed at the outer end part of the guide rail, the other end of the third measuring device is provided with a second wedge-shaped block moving up and down, the lower end surface of the second wedge-shaped block is provided with a third inclined surface, the upper end surface of the movable wedge-shaped block is provided with a fourth inclined surface, and the third inclined surface is matched with the fourth inclined surface. Primary amplification is carried out through the primary wedge-shaped structure, secondary amplification is carried out on the primary amplification distance through the secondary wedge-shaped device, the amplification proportion can reach 5-10 through reasonable design, and the measurement error of the eccentricity is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of engine fault simulation test, and in particular to a device and method for measuring the eccentricity of a friction casing installation. Background Art

[0002] In the field of aircraft engines, in order to improve the efficiency of aircraft engines, the clearance between the rotor and the stator is designed to be very small, and the clearance is generally less than 1mm. However, excessive vibration of the engine rotor or unstable flow will cause rotor-stator friction, and too small rotor-stator clearance makes it easier for the dynamic and stator to rub against each other.

[0003] Once the rotor-static friction occurs, it will first destroy the original force and thermal balance of the rotor system, generate noise and cause large vibrations, thereby deteriorating the operating state of the machine. Severe friction can directly lead to machine damage.

[0004] Based on the above reasons, many friction failures have occurred at home and abroad, some of which have caused huge economic losses. Therefore, this field needs to strengthen the analysis and research on the mechanism of rotary-static friction failure and predict this failure as soon as possible.

[0005] In the prior art, in order to fully reveal the rotor-stator rubbing mechanism and rotor-stator rubbing failure characteristics, researchers often use engine rotor-stator rubbing failure simulators to conduct relevant research. There are many cases of rubbing failures in aircraft engines due to eccentric installation of the stator casing, so it is essential to explore the impact of the eccentricity of the rubbing casing installation on rubbing failures.

[0006] In view of this, the inventor of the present application has designed a device and method for measuring the eccentricity of a friction casing installation in order to overcome the above-mentioned technical problems. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the prior art that the rotor-stator is prone to rubbing and causing rotor-stator rubbing failures, and to provide a device and method for measuring the eccentricity of the rubbing casing installation.

[0008] The present invention solves the above technical problems through the following technical solutions:

[0009] A device for measuring the eccentricity of a friction casing installation, characterized in that the device comprises:

[0010] A first measuring device, wherein one end of the first measuring device is used to be fixed to the casing, and the other end is provided with a first wedge block, and the upper end surface of the first wedge block is provided with a first inclined surface;

[0011] a second measuring device, wherein one end of the second measuring device is used to be fixed to the casing, and the other end is provided with a movable wedge block, the movable wedge block is slidably provided on the guide rail, the lower end surface of the movable wedge block is provided with a second inclined surface, the first inclined surface and the second inclined surface cooperate with each other, and the first wedge block pushes the movable wedge block to slide along the guide rail through the first inclined surface;

[0012] A third measuring device, one end of which is fixed to the outer end of the guide rail, and the other end is provided with a second wedge block that moves up and down, the lower end surface of the second wedge block is provided with a third inclined surface, and the upper end surface of the movable wedge block is provided with a fourth inclined surface, the third inclined surface and the fourth inclined surface cooperate with each other, and the movable wedge block pushes the second wedge block to move upward through the fourth inclined surface.

[0013] According to one embodiment of the present invention, the first measuring device further comprises a first extension rod, one end of the first extension rod is used to be fixed to the casing, and the other end of the first extension rod is connected to the first wedge block;

[0014] The second measuring device also includes a second extension rod, one end of which is used to be fixed to the casing, the other end of which is connected to one end of the movable wedge block, and the other end of the movable wedge block is passed through the guide rail.

[0015] According to one embodiment of the present invention, an eccentric stopper is fixed to the second end of the second extension rod, the other side of the eccentric stopper is fixedly connected to the guide rail, and the movable wedge block is disposed on the guide rail;

[0016] A first stopper is installed at the outer end of the guide rail, and an elastic component is installed on the guide rail, and the elastic component is located between the movable wedge block and the first stopper.

[0017] According to one embodiment of the present invention, the third measuring device comprises a second stopper, a connecting rod and an extended baffle assembly, wherein the second stopper is mounted on the eccentric stopper, one end of the connecting rod is fixedly connected to the second stopper, and the second wedge block is slidably connected to the other end of the connecting rod;

[0018] One end of the extended baffle assembly is connected to the outer wall surface of the second wedge block, and the other end is installed on the first baffle block.

[0019] According to an embodiment of the present invention, a guide rail block is disposed at the other end of the connecting rod, the guide rail block has a through hole, and the second stop block is slidably disposed in the through hole.

[0020] According to one embodiment of the present invention, the extended baffle assembly includes a first extended baffle, a connecting rod and a second extended baffle, the first extended baffle is installed on the outer wall surface of the second wedge block, one end of the connecting rod is connected to the first extended baffle, and the other end is connected to the second extended baffle, and the second extended baffle is installed on the first baffle.

[0021] According to an embodiment of the present invention, a protrusion is provided on the upper end surface of the movable wedge block, the fourth inclined surface is located on the protrusion, and the fourth inclined surface cooperates with the third inclined surface up and down.

[0022] According to an embodiment of the present invention, the protrusion is a triangular block.

[0023] According to an embodiment of the present invention, a high-precision measuring instrument is installed on the first stop block to measure the horizontal movement displacement of the movable wedge block.

[0024] According to an embodiment of the present invention, the elastic component is a soft spring.

[0025] According to an embodiment of the present invention, a first mounting seat with a threaded hole is disposed at one end of the first extension rod, and a second mounting seat with a threaded hole is disposed at one end of the second extension rod.

[0026] The present invention also provides a method for measuring the eccentricity of a friction casing installation, which is characterized in that the method adopts the above-mentioned device for measuring the eccentricity of a friction casing installation, and the method comprises: connecting one end of the first measuring device to the horizontal position of the eccentrically installed casing, and connecting one end of the second measuring device to the horizontal position of the fixed casing;

[0027] The eccentrically mounted casing is moved vertically upward, so that the first wedge block pushes the movable wedge block to translate, and the eccentricity of the eccentrically mounted casing is amplified for the first time through the bevel angles of the first bevel and the second bevel;

[0028] The movable wedge block translates and pushes the second wedge block to move, thereby amplifying the eccentricity of the eccentrically mounted receiver for a second time and measuring the eccentricity of the eccentrically mounted receiver.

[0029] According to one embodiment of the present invention, the measuring method adopts a plurality of measuring devices for the rubbing casing installation eccentricity, and the measuring devices for the rubbing casing installation eccentricity are evenly distributed on the eccentrically installed casing and the fixed casing.

[0030] The positive and progressive effects of the present invention are:

[0031] The present invention discloses a device and method for measuring the eccentricity of a rubbing casing installation, which can accurately measure the eccentricity of a rubbing casing installation, and has the characteristics of simple structure, convenient installation, and high precision. It does not damage the structure of the casing itself, and improves the test efficiency.

[0032] The device for measuring the installation eccentricity of the friction casing is provided by installing two measuring devices at horizontal positions on the casing to be measured, and when the casing flange is tilted, the real installation eccentricity is obtained by averaging the two measured values.

[0033] The measuring device amplifies the installation eccentricity of the rubbing casing once through a primary wedge structure, and amplifies the primary amplified distance twice through a secondary wedge device. Through reasonable design, the amplification ratio can reach 5 to 10, reducing the measurement error of the installation eccentricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0035] Figure 1 A three-dimensional measuring device for installing an eccentricity measurement device for the friction casing of the present invention Figure 1 .

[0036] Figure 2 A three-dimensional measuring device for installing an eccentricity measurement device for the friction casing of the present invention Figure 2 .

[0037] Figure 3 The present invention is a schematic structural diagram of the first measuring device in the device for measuring the eccentricity of the friction casing installation.

[0038] Figure 4 The present invention is a schematic diagram of the structure of the second measuring device in the device for measuring the eccentricity of the friction casing installation.

[0039] Figure 5 The present invention is a schematic diagram of the structure of the third measuring device in the device for measuring the eccentricity of the friction casing installation.

[0040] Figure 6 The present invention is a schematic structural diagram of an extended stop block assembly in a device for measuring the eccentricity of a friction casing installation.

[0041] Figure 7 The present invention is a schematic diagram of the arrangement of the measuring device in the method for measuring the eccentricity of the friction casing installation. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.

[0044] Furthermore, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the present invention specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this document.

[0045] Furthermore, it is required that the present invention be understood not only by the actual terms used but also by the meanings connoted by each term.

[0046] like Figures 1 to 6 As shown, the present invention discloses a device for measuring the eccentricity of the rubbing casing installation, which includes: a first measuring device 10, a second measuring device 20 and a third measuring device 30. Among them, one end of the first measuring device 10 is used to be fixed to the casing, and the other end is provided with a first wedge block 11, and the upper end surface of the first wedge block 11 is provided with a first inclined surface 111. One end of the second measuring device 20 is used to be fixed to the casing, and the other end is provided with a movable wedge block 21, and the movable wedge block 21 is slidably arranged on the guide rail 22, and the lower end surface of the movable wedge block 21 is provided with a second inclined surface 211, and the first inclined surface 111 and the second inclined surface 211 are matched with each other, and the first wedge block 11 pushes the movable wedge block 21 to slide along the guide rail 22 through the first inclined surface 111.

[0047] One end of the third measuring device 30 is fixed to the outer end of the guide rail 22, and the other end is provided with a second wedge block 31 that moves up and down, and the lower end surface of the second wedge block 31 is provided with a third inclined surface 311. The upper end surface of the movable wedge block 21 is provided with a fourth inclined surface 212, and the third inclined surface 311 and the fourth inclined surface 212 are matched with each other, and the movable wedge block 21 pushes the second wedge block 31 to move upward through the fourth inclined surface 212.

[0048] Preferably, the first measuring device 10 may further include a first extension rod 12, one end of which is used to be fixed to the casing, and the other end of which is connected to the first wedge block 11. The second measuring device 20 further includes a second extension rod 23, one end of which is used to be fixed to the casing, and the other end of which is connected to one end of the movable wedge block 21, and the other end of the movable wedge block 21 is passed through the guide rail 22.

[0049] Furthermore, an eccentric stopper 24 is fixed to the second end of the second extension rod 23, and the other side of the eccentric stopper 24 is fixedly connected to the guide rail 22, so that the movable wedge block 21 is passed through the guide rail 22. A first stopper 25 is installed at the outer end of the guide rail 22, and an elastic component 26 is installed on the guide rail 22, and the elastic component 26 is located between the movable wedge block 21 and the first stopper 25.

[0050] Preferably, the third measuring device 30 comprises a second stopper 32, a connecting rod 33 and an extended baffle assembly 34. The second stopper 32 is mounted on the eccentric stopper 24, one end of the connecting rod 33 is fixedly connected to the second stopper 32, and the second wedge block 31 is slidably connected to the other end of the connecting rod 33. One end of the extended baffle assembly 34 is connected to the outer wall surface of the second wedge block 31, and the other end is mounted on the first stopper 25.

[0051] A guide block 35 is disposed at the other end of the connecting rod 33 . The guide block 35 has a through hole, and the second stopper 32 is slidably disposed in the through hole.

[0052] like Figure 6 As shown, the extended stopper assembly 34 preferably includes a first extended stopper 341, a connecting rod 342, and a second extended stopper 343. The first extended stopper 341 is mounted on the outer wall surface of the second wedge block 31, one end of the connecting rod 342 is connected to the first extended stopper 341, and the other end is connected to the second extended stopper 343, and the second extended stopper 343 is mounted on the first stopper 25.

[0053] Furthermore, a convex block 213 is provided on the upper end surface of the movable wedge block 21, and the fourth inclined surface 212 is located on the convex block 213, and the fourth inclined surface 212 and the third inclined surface 311 cooperate with each other up and down. The convex block 213 is preferably a triangular block.

[0054] In particular, a high-precision measuring instrument (not shown) is mounted on the first stopper 25 to measure the horizontal displacement of the movable wedge block 21. The elastic component 26 is preferably a soft spring.

[0055] In addition, a first mounting seat 121 with a threaded hole may be provided at one end of the first extension rod 12. The first mounting seat 121 with a threaded hole has the first extension rod 12, and the first wedge block 11 with a bevel angle θ is fixedly connected to the first extension rod 12, and a portion of the end where the first wedge block 11 is connected to the first extension rod 12 is horizontally cut off.

[0056] A second mounting seat 231 with a threaded hole is provided at one end of the second extension rod 23. The second mounting seat 231 with a threaded hole has a second extension rod 23, and an eccentric stopper 24 is eccentrically fixedly connected to the other side of the second extension rod 23. The other side of the eccentric stopper 24 is fixedly connected to two cylindrical guide rails 22, and a movable wedge block 21 with a bevel angle of θ is installed on the cylindrical guide rail 22. The movable wedge block 21 contains a protruding triangular block with an angle of Φ, and a first stopper 25 is installed on the other side of the cylindrical guide rail 22. There are two soft springs fixed on the cylindrical guide rail 22 between the first stopper 25 and the first wedge block 11. A measuring instrument with an accuracy of 0.01mm is fixedly connected to the first stopper 25, which can measure the horizontal displacement of the movable wedge block 21.

[0057] The wedge device (i.e., the third measuring device 30) having a protruding triangular block with an angle of Φ is in smooth contact with the movable wedge block 21, including a second stopper 32, a connecting rod 33 fixedly connected to the fulcrum of the guide rail block 35, and a triangular block with an angle of Φ (i.e., the second wedge block 31), one end of which is an inclined surface and the other end is a flat surface. The other end of the triangular block with an angle of Φ (i.e., the second wedge block 31) is in smooth contact with the first extended baffle 341, the connecting rod 342, and the second extended baffle 343, preventing the triangular block with an angle of Φ (i.e., the second wedge block 31) from moving down along the inclined surface.

[0058] like Figure 7 As shown, the present invention also provides a method for measuring the eccentricity of a friction casing installation, which adopts the measuring device for measuring the eccentricity of a friction casing installation as described above, and the measuring method comprises: connecting one end of a first measuring device 10 to a horizontal position of an eccentrically installed casing 40, and connecting one end of a second measuring device 20 to a horizontal position of a fixed casing 50.

[0059] The eccentrically mounted casing 40 is moved vertically upward, so that the first wedge block 11 pushes the movable wedge block 21 to translate, and the eccentricity of the eccentrically mounted casing 40 is amplified for the first time through the bevel angles of the first bevel 111 and the second bevel 211 .

[0060] The movable wedge block 21 translates to push the second wedge block 31 to move, so as to amplify the eccentricity of the eccentrically mounted casing 40 for the second time and measure the eccentricity of the eccentrically mounted casing 40 .

[0061] Further preferably, the measuring method adopts a plurality of measuring devices for the eccentricity of the friction casing installation, and the measuring devices for the eccentricity of the friction casing installation are evenly distributed on the eccentrically installed casing and the fixed casing.

[0062] In the measuring method, the eccentrically mounted casing 40 and the fixed casing 50 are initially mounted in zero eccentricity, the first measuring device 10 is threadedly connected to the horizontal position of the eccentrically mounted casing 40, the second measuring device 20 is threadedly connected to the horizontal position of the fixed casing 50, and the eccentrically mounted casing 40 is moved vertically upward to make the movable wedge block 21 translate. The eccentrically mounted casing can be enlarged according to the inclined angles of the first wedge block 11 and the movable wedge block 21, and the eccentricity of the eccentrically mounted casing 40 can be measured once. Then, the first enlarged distance is enlarged twice by contacting the third measuring device 30 with a protruding triangular block of an angle of Φ, and the tiny displacement is enlarged twice to make the measurement more accurate. Figure 7 Only the measuring device at one horizontal end is shown. During actual measurement, measuring devices are arranged at both horizontal ends to prevent the casing from tilting.

[0063] As described above, the device and method for measuring the eccentricity of the friction casing installation of the present invention have the following innovative features:

[0064] 1. First, the method of the present invention to explore the influence of the eccentricity of the casing installation on the friction is: the casing flange is connected by bolts, the bolt hole diameter is larger than the bolt diameter used, and the eccentricity of the casing installation can be adjusted.

[0065] Second, the measuring device does not require any modification to the casing structure being measured.

[0066] 3. The measuring device can be fixed on the edge of the casing flange to be measured by using the process threaded holes of the casing flange, and the installation is simple.

[0067] Fourth, by installing two measuring devices in a horizontal position on the measured receiver, when the receiver flange is tilted, the actual installation eccentricity is obtained by averaging the two measured values.

[0068] 5. The measuring device will amplify the installation eccentricity of the rubbing casing once through a primary wedge structure, and will amplify the primary amplified distance twice through a secondary wedge device. Through reasonable design, the amplification ratio can reach 5 to 10, reducing the measurement error of the installation eccentricity.

[0069] In summary, the device and method for measuring the eccentricity of the rubbing casing installation of the present invention can accurately measure the eccentricity of the rubbing casing installation, and has the characteristics of simple structure, convenient installation and high precision. It does not destroy the structure of the casing itself, and improves the test efficiency.

[0070] The device for measuring the installation eccentricity of the friction casing is provided by installing two measuring devices at horizontal positions on the casing to be measured, and when the casing flange is tilted, the real installation eccentricity is obtained by averaging the two measured values.

[0071] The measuring device amplifies the installation eccentricity of the rubbing casing once through a primary wedge structure, and amplifies the primary amplified distance twice through a secondary wedge device. Through reasonable design, the amplification ratio can reach 5 to 10, reducing the measurement error of the installation eccentricity.

[0072] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A device for measuring the eccentricity of a friction casing installation, characterized in that: The measuring device comprises: A first measuring device, wherein one end of the first measuring device is used to be fixed to the casing, and the other end is provided with a first wedge block, and the upper end surface of the first wedge block is provided with a first inclined surface; a second measuring device, wherein one end of the second measuring device is used to be fixed to the casing, and the other end is provided with a movable wedge block, the movable wedge block is slidably provided on the guide rail, the lower end surface of the movable wedge block is provided with a second inclined surface, the first inclined surface and the second inclined surface cooperate with each other, and the first wedge block pushes the movable wedge block to slide along the guide rail through the first inclined surface; A third measuring device, one end of which is fixed to the outer end of the guide rail, and the other end is provided with a second wedge block that moves up and down, the lower end surface of the second wedge block is provided with a third inclined surface, and the upper end surface of the movable wedge block is provided with a fourth inclined surface, the third inclined surface and the fourth inclined surface cooperate with each other, and the movable wedge block pushes the second wedge block to move upward through the fourth inclined surface.

2. The device for measuring the eccentricity of the rubbing casing installation according to claim 1, characterized in that: The first measuring device further comprises a first extension rod, one end of which is used to be fixed to the casing, and the other end of which is connected to the first wedge block; The second measuring device also includes a second extension rod, one end of which is used to be fixed to the casing, the other end of which is connected to one end of the movable wedge block, and the other end of the movable wedge block is passed through the guide rail.

3. The device for measuring the eccentricity of the friction casing installation as claimed in claim 2, characterized in that: An eccentric stopper is fixed to the second end of the second extension rod, the other side of the eccentric stopper is fixedly connected to the guide rail, and the movable wedge block is passed through the guide rail; A first stopper is installed at the outer end of the guide rail, and an elastic component is installed on the guide rail, and the elastic component is located between the movable wedge block and the first stopper.

4. The device for measuring the eccentricity of the friction casing installation as claimed in claim 3, characterized in that: The third measuring device comprises a second stopper, a connecting rod and an extended stopper assembly, wherein the second stopper is mounted on the eccentric stopper, one end of the connecting rod is fixedly connected to the second stopper, and the second wedge block is slidably connected to the other end of the connecting rod; One end of the extended baffle assembly is connected to the outer wall surface of the second wedge block, and the other end is installed on the first baffle block.

5. The device for measuring the eccentricity of the friction casing installation as claimed in claim 4, characterized in that: A guide rail block is arranged at the other end of the connecting rod. The guide rail block has a through hole. The second stop block is slidably arranged in the through hole.

6. The device for measuring the eccentricity of the friction casing installation as claimed in claim 5, characterized in that: The extended baffle assembly includes a first extended baffle, a connecting rod and a second extended baffle. The first extended baffle is installed on the outer wall surface of the second wedge block. One end of the connecting rod is connected to the first extended baffle, and the other end is connected to the second extended baffle. The second extended baffle is installed on the first baffle.

7. The device for measuring the eccentricity of the friction casing installation as claimed in claim 1, characterized in that: The upper end surface of the movable wedge block is provided with a protrusion, the fourth inclined surface is located on the protrusion, and the fourth inclined surface and the third inclined surface cooperate with each other up and down.

8. The device for measuring the eccentricity of the friction casing installation as claimed in claim 7, characterized in that: The convex block is a triangular block.

9. The device for measuring the eccentricity of the friction casing installation as claimed in claim 3, characterized in that: A high-precision measuring instrument is installed on the first stop block to measure the horizontal movement displacement of the movable wedge block.

10. The device for measuring the eccentricity of the friction casing installation as claimed in claim 3, characterized in that: The elastic component is a soft spring.

11. The device for measuring the eccentricity of the friction casing installation as claimed in claim 2, characterized in that: A first mounting seat with a threaded hole is disposed at one end of the first extension rod, and a second mounting seat with a threaded hole is disposed at one end of the second extension rod.

12. A method for measuring the eccentricity of a friction casing installation, characterized in that: The measuring method adopts the measuring device for measuring the eccentricity of the rubbing casing installation as described in claims 1 to 11, and the measuring method comprises: connecting one end of the first measuring device to the horizontal position of the eccentrically installed casing, and connecting one end of the second measuring device to the horizontal position of the fixed casing; The eccentrically mounted casing is moved vertically upward, so that the first wedge block pushes the movable wedge block to translate, and the eccentricity of the eccentrically mounted casing is amplified for the first time through the bevel angles of the first bevel and the second bevel; The movable wedge block translates and pushes the second wedge block to move, thereby amplifying the eccentricity of the eccentrically mounted receiver for a second time and measuring the eccentricity of the eccentrically mounted receiver.

13. The method for measuring the eccentricity of the friction casing installation according to claim 12, characterized in that: The measuring method adopts a plurality of measuring devices for the eccentricity of the friction casing installation, and the measuring devices for the eccentricity of the friction casing installation are evenly distributed on the eccentrically installed casing and the fixed casing.

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