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 first wedge block, and the upper end surface of the first wedge block is provided with a first inclined surface; 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, the movable wedge block is slidably arranged on the guide rail, the lower end face of the movable wedge block is provided with a second slope, and the first slope and the second slope 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 is provided with a gear transmission mechanism, the upper end surface of the movable wedge block is provided with a first tooth part, and the gear transmission mechanism is matched with the first tooth part. According to the invention, amplification is carried out through the wedge-shaped structure, secondary amplification is carried out on the primary amplification distance through the gear device, secondary amplification is carried out on infinitesimal displacement, the amplification proportion can reach 5-10 through reasonable design, and the measurement error of installation 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. Usually, 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.

[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 gear transmission mechanism, the upper end surface of the movable wedge block is provided with a first tooth portion, the gear transmission mechanism cooperates with the first tooth portion, and the movable wedge block pushes the gear transmission mechanism to translate through the first tooth portion.

[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 further comprises a baffle and a shaft rod assembly, the gear transmission mechanism comprises a first gear, a second gear, a connecting rod, a rack and a slide block, the baffle is fixed on the first baffle, and one end of the shaft rod assembly is fixed on the baffle;

[0018] The first gear and the second gear are respectively mounted on the other end of the rotating shaft assembly, and the second gear is meshed with the first gear up and down;

[0019] One end of the connecting rod is connected to the rotating shaft rod assembly, and the slide block is installed on the other end of the connecting rod. One end of the rack is slidably arranged in the slide block, and the other end is provided with a second tooth portion, the second tooth portion is meshed with the second gear, and the first gear is meshed with the first tooth portion.

[0020] According to one embodiment of the present invention, the rotating shaft rod assembly includes a first rotating shaft rod and a second rotating shaft rod, and one end of the first rotating shaft rod and the second rotating shaft rod are respectively fixed on the baffle;

[0021] The first gear is mounted on the other end of the first rotating shaft rod, the second gear is mounted on the other end of the second rotating shaft rod, and one end of the connecting rod is connected to the second rotating shaft rod.

[0022] According to an embodiment of the present invention, the first rotating shaft rod and the second rotating shaft rod are arranged parallel to each other.

[0023] According to an embodiment of the present invention, the diameter of the first gear is smaller than the diameter of the second gear.

[0024] According to an embodiment of the present invention, the first rotating shaft rod is located below the second rotating shaft rod, and the first gear is located below the second gear.

[0025] According to an embodiment of the present invention, the slide rail block has a through hole, and one end of the rack is slidably disposed in the through hole.

[0026] 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.

[0027] According to an embodiment of the present invention, the elastic component is a soft spring.

[0028] 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.

[0029] 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;

[0030] 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;

[0031] The movable wedge block translates and drives the gear transmission mechanism to move, so as to amplify the eccentricity of the eccentrically mounted casing for a second time and measure the eccentricity of the eccentrically mounted casing.

[0032] According to one embodiment of the present invention, the measuring method uses a plurality of measuring devices for the eccentricity of the rubbing casing installation, and the measuring devices for the eccentricity of the rubbing casing installation are evenly distributed on the eccentric installation casing and the fixed casing.

[0033] The positive and progressive effects of the present invention are:

[0034] 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.

[0035] 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.

[0036] The measuring device amplifies the installation eccentricity of the rubbing casing through a wedge structure, amplifies the primary amplification distance through a gear device, and amplifies the small displacement through the secondary amplification to make the measurement more accurate. Through reasonable design, the amplification ratio can reach 5 to 10, reducing the measurement error of the installation eccentricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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:

[0038] Figure 1 A three-dimensional diagram of a device for measuring the eccentricity of a friction casing according to the present invention.

[0039] 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.

[0040] 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.

[0041] Figure 4 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.

[0042] 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

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] like Figures 1 to 4 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 a first inclined surface 111 is provided on the upper end surface of the first wedge block 11. 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.

[0048] 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 gear transmission mechanism 31. A first tooth portion 212 is provided on the upper end surface of the movable wedge block 21, and the gear transmission mechanism 31 is matched with the first tooth portion 212. The movable wedge block 21 pushes the gear transmission mechanism 31 to translate through the first tooth portion 212.

[0049] The first measuring device 10 further includes 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 a movable wedge block 21, and the other end of the movable wedge block 21 is passed through the guide rail 22.

[0050] 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 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.

[0051] Preferably, the third measuring device 30 includes a baffle plate 32 and a rotating shaft rod assembly, and the gear transmission mechanism 31 includes a first gear 33, a second gear 34, a connecting rod 35, a rack 36 and a slide block 37. The baffle plate 32 is fixed on the first baffle block 25, and one end of the rotating shaft rod assembly is fixed on the baffle plate 32. The first gear 33 and the second gear 34 are respectively mounted on the other end of the rotating shaft rod assembly, and the second gear 34 and the first gear 33 are meshed up and down. One end of the connecting rod 35 is connected to the rotating shaft rod assembly, and the slide block 37 is mounted on the other end of the connecting rod 35. One end of the rack 36 is slidably arranged in the slide block 37, and the other end is provided with a second tooth portion 38, the second tooth portion 38 is meshed with the second gear 34, and the first gear 33 is meshed with the first tooth portion 212.

[0052] Preferably, the shaft rod assembly can include a first shaft rod 38 and a second shaft rod 39, and one end of the first shaft rod 38 and the second shaft rod 39 are respectively fixed to the baffle 32. The first gear 33 is mounted on the other end of the first shaft rod 38, the second gear 34 is mounted on the other end of the second shaft rod 39, and one end of the connecting rod 35 is connected to the second shaft rod 39.

[0053] The first rotating shaft rod 38 and the second rotating shaft rod 39 are preferably arranged parallel to each other. The diameter of the first gear 33 is preferably smaller than the diameter of the second gear 34. The first rotating shaft rod 38 is preferably located below the second rotating shaft rod 39, and the first gear 33 is located below the second gear 34.

[0054] In particular, the slide rail block 37 has a through hole, and one end of the rack 36 is slidably disposed in the through hole.

[0055] Preferably, a high-precision measuring instrument (not shown) is installed 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.

[0056] Specifically, if Figure 4As shown, the second gear 34 meshes with the rack 36, and the second gear 34 meshes with the first gear 33, thereby driving the rack 36 to move. In addition, the gear transmission mechanism 31 also includes a second rotating shaft rod 39 and a first rotating shaft rod 38 for fixing the second gear 34 and the first gear 33. The rack 36 moves in a translation in the slide block 37, and the slide block 37 is fixedly connected to the second rotating shaft rod 39 through a connecting rod 35. The first rotating shaft rod 38 and the second rotating shaft rod 39 are fixedly connected to the baffle 32, and the baffle 32 is fixedly connected to the first baffle 25. A measuring instrument with an accuracy of 0.01mm is fixedly connected to the baffle 32 to measure the end surface movement distance of the rack 36.

[0057] In addition, a first mounting seat 121 with a threaded hole is provided at one end of the first extension rod 12, that is, the first extension rod 12 is mounted on the first mounting seat 121 with a threaded hole, and a first wedge block 11 with a bevel angle θ is fixedly connected to the first extension rod 112, and a portion of the end portion where the first wedge block 11 is connected to the first extension rod 12 is horizontally cut off.

[0058] A second mounting seat 231 with a threaded hole is provided at one end of the second extension rod 23, that is, 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. A movable wedge block 21 with a bevel angle of θ is installed on the cylindrical guide rail 22, and a plurality of teeth (i.e., a first tooth portion 212) is provided on the movable wedge block 21. A first stopper 25 is installed on the other side of the cylindrical guide rail 22, and two soft springs (i.e., elastic components 26) are fixed on the cylindrical guide rail 22 between the first stopper 25 and the movable wedge block 21. A measuring instrument with an accuracy of 0.01 mm can be preferably fixedly connected to the first stopper 25 to measure the horizontal displacement of the movable wedge block 21.

[0059] like Figure 5 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.

[0060] 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 .

[0061] The movable wedge block 21 translates to push the gear transmission mechanism 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.

[0062] 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.

[0063] In the measurement 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 by enlarging it once. Then, the once enlarged distance is enlarged twice through the gear transmission mechanism, and the tiny displacement is enlarged by the secondary amplification, 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.

[0064] 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:

[0065] 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.

[0066] Second, the measuring device does not require any modification to the casing structure being measured.

[0067] 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.

[0068] 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.

[0069] 5. The measuring device amplifies the installation eccentricity of the friction casing through a wedge structure. Through reasonable design, the amplification ratio can reach 5 to 10, reducing the measurement error of the installation eccentricity.

[0070] 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.

[0071] 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.

[0072] The measuring device amplifies the installation eccentricity of the rubbing casing through a wedge structure, amplifies the primary amplification distance through a gear device, and amplifies the small displacement through the secondary amplification to make the measurement more accurate. Through reasonable design, the amplification ratio can reach 5 to 10, reducing the measurement error of the installation eccentricity.

[0073] 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 gear transmission mechanism, the upper end surface of the movable wedge block is provided with a first tooth portion, the gear transmission mechanism cooperates with the first tooth portion, and the movable wedge block pushes the gear transmission mechanism to translate through the first tooth portion.

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 further comprises a baffle and a rotating shaft rod assembly, the gear transmission mechanism comprises a first gear, a second gear, a connecting rod, a rack and a slide block, the baffle is fixed on the first baffle, and one end of the rotating shaft rod assembly is fixed on the baffle; The first gear and the second gear are respectively mounted on the other end of the rotating shaft assembly, and the second gear is meshed with the first gear up and down; One end of the connecting rod is connected to the rotating shaft rod assembly, and the slide block is installed on the other end of the connecting rod. One end of the rack is slidably arranged in the slide block, and the other end is provided with a second tooth portion, the second tooth portion is meshed with the second gear, and the first gear is meshed with the first tooth portion.

5. The device for measuring the eccentricity of the rubbing casing installation as claimed in claim 4, characterized in that: The rotating shaft rod assembly comprises a first rotating shaft rod and a second rotating shaft rod, and one end of the first rotating shaft rod and the second rotating shaft rod are respectively fixed on the baffle; The first gear is mounted on the other end of the first rotating shaft rod, the second gear is mounted on the other end of the second rotating shaft rod, and one end of the connecting rod is connected to the second rotating shaft rod.

6. The device for measuring the eccentricity of the friction casing installation as claimed in claim 5, characterized in that: The first rotating shaft rod and the second rotating shaft rod are arranged parallel to each other.

7. The device for measuring the eccentricity of the friction casing installation as claimed in claim 6, characterized in that: A diameter of the first gear is smaller than a diameter of the second gear.

8. The device for measuring the eccentricity of the friction casing installation as claimed in claim 7, characterized in that: The first rotating shaft rod is located below the second rotating shaft rod, and the first gear is located below the second gear.

9. The device for measuring the eccentricity of the friction casing installation as claimed in claim 4, characterized in that: The slide rail block has a through hole, and one end of the rack is slidably arranged in the through hole.

10. 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.

11. 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.

12. 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.

13. A method for measuring the eccentricity of a friction casing installation, characterized in that: The measuring method uses the measuring device for measuring the eccentricity of the rubbing casing installation as described in 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, 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 drives the gear transmission mechanism to move, so as to amplify the eccentricity of the eccentrically mounted casing for a second time and measure the eccentricity of the eccentrically mounted casing.

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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