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 used for being fixed to a casing, the other end of the first measuring device is provided with a wedge block, and the upper end face of the wedge block is set as a first inclined plane; one end of the second measuring device is used for being fixed to the cartridge receiver, 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 face of the movable wedge block is a second inclined face, the first inclined face and the second inclined face are matched with each other, and the wedge block pushes the movable wedge block to slide along the guide rail through the first inclined face; the lever device is installed at the outer end of the guide rail and comprises a lever, the lever makes contact with the outer wall face of the movable wedge-shaped block, and the movable wedge-shaped block pushes the lever to move. The mounting eccentricity of the rub-impact cartridge receiver is subjected to primary amplification through the wedge-shaped structure, the primary amplification distance is subjected to secondary amplification through the lever device, and the measurement error of the mounting 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, for example, 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 the fault characteristics of rotor-stator rubbing, researchers often use engine rotor-stator rubbing fault simulator to carry out 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 influence of the eccentricity of the rubbing casing installation on the rubbing failure.

[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 of the first measuring device is provided with a wedge block, and the upper end surface of the wedge block is provided as 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 wedge block pushes the movable wedge block to slide along the guide rail through the first inclined surface;

[0012] A lever device is installed on the outer end of the guide rail, and the lever device includes a lever, the lever is in contact with the outer wall surface of the movable wedge block, and the movable wedge block pushes the lever to move.

[0013] According to one embodiment of the present invention, the lever device also includes a mounting plate and an elastic component, the mounting plate is fixed on the outer end of the guide rail, the lever is rotatably connected to the mounting plate, one end of the elastic component is connected to the lever, and the other end is connected to the mounting plate.

[0014] 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 wedge block;

[0015] The second measuring device also includes a second extension rod, one end of the second extension rod is used to be fixed to the receiver, the other end of the second extension rod 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.

[0016] According to an embodiment of the present invention, the mounting plate is a bent flat plate.

[0017] According to one embodiment of the present invention, the bending plate includes a flat portion and a bending portion, the flat portion is fixed to the outer end of the guide rail, the bending portion extends horizontally in a direction close to the movable wedge block, and the lever is rotatably connected to the bending portion.

[0018] According to an embodiment of the present invention, the lever is connected to the bending portion via a fulcrum.

[0019] According to an embodiment of the present invention, the lever and the flat plate portion are parallel to each other.

[0020] According to an embodiment of the present invention, the elastic component is a soft spring.

[0021] 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.

[0022] 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;

[0023] A stopper is installed at the outer end of the guide rail, and a spring is installed on the guide rail, wherein the spring is located between the movable wedge block and the stopper.

[0024] According to an embodiment of the present invention, a protrusion is provided on the outer upper end portion of the movable wedge block, and the protrusion is in contact with the lever.

[0025] According to one embodiment of the present invention, a high-precision measuring instrument is installed on the mounting plate to measure the movement displacement of the lever.

[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 to make the movable wedge block 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 lever 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. The device for measuring the eccentricity of a rubbing casing installation installs two measuring devices at a horizontal position on the casing to be measured, and when the casing flange is tilted, the actual installation eccentricity is obtained by averaging the two measured values.

[0032] The measuring device amplifies the installation eccentricity of the rubbing casing once through a wedge structure, and amplifies the once-magnified distance twice through a lever device. Through reasonable design, the amplification ratio can reach 5 to 10, reducing the measurement error of the installation eccentricity. It does not damage the casing structure itself, and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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:

[0034] Figure 1 A three-dimensional diagram of a device for measuring the eccentricity of a friction casing according to the present invention.

[0035] Figure 2 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.

[0036] Figure 3 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.

[0037] Figure 4 The present invention is a schematic diagram of the structure of the lever device in the device for measuring the eccentricity of the friction casing installation.

[0038] Figure 5 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

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] like Figures 1 to 4As 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 lever 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 wedge block 11, and the upper end surface of the wedge block 11 is set as 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 set on the guide rail 22, and the lower end surface of the movable wedge block 21 is set as a second inclined surface 211. The first inclined surface 111 and the second inclined surface 211 cooperate with each other, and the wedge block 11 pushes the movable wedge block 21 to slide along the guide rail 22 through the first inclined surface 111.

[0044] The lever device 30 is mounted on the outer end of the guide rail 22. The lever device 30 may include a lever 31, the lever 31 contacts the outer wall surface of the movable wedge block 21, and the movable wedge block 21 pushes the lever 31 to move.

[0045] Preferably, the lever device 30 in this embodiment also includes a mounting plate 32 and an elastic component 33, the mounting plate 32 is fixed to the outer end of the guide rail 22, the lever 31 is rotatably connected to the mounting plate 32, one end of the elastic component 33 is connected to the lever 31, and the other end is connected to the mounting plate 32.

[0046] The elastic component 33 is preferably a soft spring.

[0047] 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 wedge block 11. The second measuring device 20 may further include 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.

[0048] A first mounting seat 121 with a threaded hole is 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 extension rod 12 is fixedly connected with a wedge block 11 with a bevel angle of θ, and a portion of the end where the wedge block 11 is connected to the first extension rod 12 is horizontally cut off.

[0049] Here, the mounting plate 32 can be configured as a bent flat plate, which includes a flat plate portion 321 and a bent portion 322, wherein the flat plate portion 321 is fixed to the outer end of the guide rail 22, the bent portion 322 extends horizontally in a direction close to the movable wedge block 21, and the lever 31 is rotatably connected to the bent portion 322.

[0050] For example, the lever 31 is connected to the bent portion 322 via a fulcrum. The lever 31 and the flat plate portion 321 are preferably parallel to each other.

[0051] 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, and the movable wedge block 21 is passed through the guide rail 22. A stopper 25 is installed at the outer end of the guide rail 22, and a spring 26 is installed on the guide rail 22, and the spring 26 is located between the movable wedge block 21 and the stopper 25.

[0052] 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 the second extension rod 23, and the other side of the second extension rod 23 is eccentrically fixedly connected to an eccentric stopper 24, and the other side of the eccentric stopper 24 is fixedly connected to two cylindrical guide rails 22, and the cylindrical guide rails 22 are installed with a movable wedge block 21 with a bevel angle of θ.

[0053] Preferably, a protrusion 212 is provided on the outer upper end of the movable wedge block 21 , and the protrusion 212 is in contact with the lever 31 .

[0054] The movable wedge block 21 includes a protruding triangular block (i.e., a convex block 211), and a stopper 25 is installed on the other side of the cylindrical guide rail 22. Two soft springs are fixed on the cylindrical guide rail 22 between the stopper 25 and the wedge block 11. A measuring instrument with an accuracy of 0.01mm is fixed to the stopper 25 to measure the horizontal displacement of the movable wedge block 21.

[0055] The triangular block protruding from the movable wedge block 21 contacts the lever device 30, and the soft spring (i.e., the elastic component 33) is fixedly connected to the bending plate. The other end is fixedly connected to the lever 31, and the lever 31 is connected to the bending plate through a fulcrum. The bending plate is fixedly connected to a high-precision measuring instrument (not shown in the figure) to measure the displacement of the lever 31.

[0056] For example, a high-precision measuring instrument (not shown) is mounted on the mounting plate 32 to measure the movement displacement of the lever.

[0057] like Figure 5 As shown, the present invention also provides a method for measuring the eccentricity of a friction receiver installation, which adopts the measuring device for measuring the eccentricity of a friction receiver installation as described above, and the measuring method includes: connecting one end of a first extension rod 12 to a horizontal position of an eccentrically installed receiver 40, and connecting one end of a second extension rod 21 to a horizontal position of a fixed receiver 50.

[0058] The eccentrically mounted casing 40 is moved vertically upward to cause 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 .

[0059] The movable wedge block 21 translates to push the lever 31 to move, so that the eccentricity of the eccentrically mounted casing 40 is amplified for the second time, and the eccentricity of the eccentrically mounted casing 40 is measured.

[0060] 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.

[0061] 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, and the second measuring device 20 is threadedly connected to the horizontal position of the fixed casing 50. The eccentrically mounted casing 40 is moved vertically upward, so that the movable wedge 21 is translated. The eccentrically mounted casing 40 can be magnified according to the inclined angles of the wedge block 11 and the movable wedge block 21, that is, the eccentricity of the eccentrically mounted casing 40 can be magnified once and measured, and the once-magnified distance is magnified twice through the lever device 30, and the tiny displacement is magnified twice, so that the measurement is more accurate. Figure 5 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.

[0062] 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:

[0063] 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.

[0064] Second, the measuring device does not require any modification to the casing structure being measured.

[0065] 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.

[0066] 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.

[0067] 5. The measuring device will amplify the installation eccentricity of the friction casing once through a wedge structure, and will amplify the once-magnified distance twice through a lever device. Through reasonable design, the amplification ratio can reach 5 to 10, reducing the measurement error of the installation eccentricity.

[0068] 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. The device for measuring the eccentricity of the rubbing casing installation installs two measuring devices in a horizontal position on the measured casing, and when the casing flange is tilted, the actual installation eccentricity is obtained by averaging the two measured values.

[0069] The measuring device amplifies the installation eccentricity of the rubbing casing once through a wedge structure, and amplifies the once-magnified distance twice through a lever device. Through reasonable design, the amplification ratio can reach 5 to 10, reducing the measurement error of the installation eccentricity. It does not damage the casing structure itself, and improves the test efficiency.

[0070] 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 of the first measuring device is provided with a wedge block, and the upper end surface of the wedge block is provided as 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 wedge block pushes the movable wedge block to slide along the guide rail through the first inclined surface; A lever device is installed on the outer end of the guide rail, and the lever device includes a lever, the lever is in contact with the outer wall surface of the movable wedge block, and the movable wedge block pushes the lever to move.

2. The device for measuring the eccentricity of the rubbing casing installation according to claim 1, characterized in that: The lever device also includes a mounting plate and an elastic component. The mounting plate is fixed to the outer end of the guide rail, the lever is rotatably connected to the mounting plate, one end of the elastic component is connected to the lever, and the other end is connected to the mounting plate.

3. The device for measuring the eccentricity of the friction 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 wedge block; The second measuring device also includes a second extension rod, one end of the second extension rod is used to be fixed to the receiver, the other end of the second extension rod 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.

4. The device for measuring the eccentricity of the rubbing casing installation as claimed in claim 2, characterized in that: The mounting plate is a bent flat plate.

5. The device for measuring the eccentricity of the rubbing casing installation as claimed in claim 4, characterized in that: The bending plate includes a flat plate portion and a bending portion, the flat plate portion is fixed on the outer end portion of the guide rail, the bending portion extends horizontally in a direction close to the movable wedge block, and the lever is rotatably connected to the bending portion.

6. The device for measuring the eccentricity of the friction casing installation as claimed in claim 5, characterized in that: The lever is connected to the bending portion via a fulcrum.

7. The device for measuring the eccentricity of the friction casing installation as claimed in claim 6, characterized in that: The lever and the flat plate portion are parallel to each other.

8. The device for measuring the eccentricity of the rubbing casing installation as claimed in claim 2, characterized in that: The elastic component is a soft spring.

9. The device for measuring the eccentricity of the friction casing installation as claimed in claim 3, 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.

10. The device for measuring the eccentricity of the friction casing installation as claimed in claim 3, 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 stopper is installed at the outer end of the guide rail, and a spring is installed on the guide rail, wherein the spring is located between the movable wedge block and the stopper.

11. The device for measuring the eccentricity of the friction casing installation according to claim 1, characterized in that: A convex block is arranged on the outer upper end portion of the movable wedge block, and the convex block contacts the lever.

12. The device for measuring the eccentricity of the friction casing installation as claimed in claim 2, characterized in that: A high-precision measuring instrument is installed on the mounting plate to measure the movement displacement of the lever.

13. 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 claimed in any one of claims 1 to 12, 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 to make the movable wedge block 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 lever to move, thereby amplifying the eccentricity of the eccentrically mounted receiver for a second time and measuring the eccentricity of the eccentrically mounted receiver.

14. The method for measuring the eccentricity of the friction casing installation according to claim 13, 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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