Carbon fiber tube diameter parameter measurement tooling and measurement method, pairing method

Abstract

The present application discloses a carbon fiber tube diameter parameter measurement tool and a measurement method and a pairing method, which belongs to the field of molecular pump dynamic traction tube measurement. The technical key points are: the visual measurement component is used to obtain the long diameter, short diameter and roundness of the carbon fiber tube; in the initial state, the four sample shape adjustment components are in a circular array and distributed around the carbon fiber tube; the sample shape adjustment components include a sample placement seat and a pneumatic clamp; the four sample placement seats serve as a placement base for the carbon fiber tube; the four pneumatic clamps can squeeze / relax the carbon fiber tube by extending / shortening, thereby adjusting the roundness of the carbon fiber tube; the pneumatic pressure of the four pneumatic clamps is connected in parallel, that is, when working, the pneumatic pressure of the four pneumatic clamps is the same. The technical solution of the present application can facilitate the judgment of whether the carbon fiber tube is qualified, the measurement of the diameter parameters of the carbon fiber tube, and the pairing of the carbon fiber tube with the turbine rotor.

Description

Technical Field

[0001] The present application relates to the field of molecular pump traction tube measurement, and more specifically, to a carbon fiber tube diameter parameter measurement tool, a measurement method, and a pairing method. Background Art

[0002] like Figure 1 As shown, for the compound molecular pump, the dynamic traction cylinder 100 and the turbine rotor 200 are bonded together by glue, and the turbine rotor 200 drives the dynamic traction cylinder 100 to rotate when rotating.

[0003] The gap between the dynamic traction cylinder 100 and the turbine rotor 200 is one of the key control indicators of the compound molecular pump: if the gap is too large, it will cause backflow, efficiency loss, and affect key characteristics such as the ultimate vacuum and compression ratio of the molecular pump; if the gap is too small, it will make it difficult to assemble the turbine and the carbon cylinder after gluing, and cause friction and thermal failure after assembly; in addition, a gap that is too large or too small will affect the bonding reliability of the turbine and the carbon fiber cylinder.

[0004] Clearance refers to the gap between the inner surface of the dynamic traction cylinder and the outer surface of the turbine rotor. Suppliers offer varying sizes for both the dynamic traction cylinder and the turbine rotor (i.e., not all products within a batch are identical). Therefore, proper matching of multiple dynamic traction cylinders and turbine rotors is crucial.

[0005] As for the turbine rotor, it is made of metal and its size can be directly measured by methods such as a vernier caliper.

[0006] For carbon fiber dynamic traction cylinders, since they are primarily manufactured by winding carbon filaments through a mold and then encapsulating them with epoxy resin, after demolding, the stresses of the carbon filament winding and the epoxy resin curing can cause deformation in the cylinder. This means that the incoming carbon fiber cylinder has a curved cross-section. This makes it difficult to accurately measure the cylinder diameter using existing measurement methods, making it difficult to determine whether the cylinder meets order requirements and to match the cylinder with the turbine rotor. Summary of the Invention

[0007] The purpose of this application is to provide a carbon fiber tube diameter parameter measurement tool to address the deficiencies of the above-mentioned prior art.

[0008] Another object of the present application is to provide a method for measuring the diameter parameters of a carbon fiber tube.

[0009] Another object of the present application is to provide a method for pairing a carbon fiber cylinder with a turbine rotor.

[0010] The technical solution of this application is as follows:

[0011] A tool for measuring the diameter parameters of a carbon fiber cylinder, wherein the carbon fiber cylinder is a dynamic traction cylinder of a compound molecular pump, comprising: a visual measurement component, four sample shape adjustment components;

[0012] Wherein, the visual measurement component is used to obtain the long diameter, short diameter and roundness of the carbon fiber tube;

[0013] Among them, in the initial state, the four sample shape adjustment components are in a circular array and distributed around the carbon fiber cylinder;

[0014] The sample shape adjustment component includes a sample placement seat and a pneumatic clamping jaw; the four sample placement seats together serve as a placement base for the carbon fiber tube; the four pneumatic clamping jaws can squeeze / relax the carbon fiber tube by extending / contracting, thereby adjusting the roundness of the carbon fiber tube;

[0015] Among them, the pneumatic pressures of the four pneumatic grippers are connected in parallel, that is, when working, the pneumatic pressures of the four pneumatic grippers are the same.

[0016] Furthermore, the moving direction of the four pneumatic grippers is the radial direction of the circular array.

[0017] Furthermore, the invention further comprises: a jaw distance adjustment component for adjusting the positions of the four sample shape adjustment components;

[0018] The clamping jaw distance adjustment assembly includes: a servo motor, a first horizontal plate, a second horizontal plate, a vertical connecting rod, a vertical moving block, an end bearing, a screw rod, and four horizontal moving seat assemblies; the housing of the servo motor is fixedly connected to the first horizontal plate, and the first horizontal plate and the second horizontal plate are fixedly connected to each other as a whole through the vertical connecting rod; the output shaft of the servo motor is connected to the screw rod, and the end bearing is fixedly provided on the side of the second horizontal plate facing the first horizontal plate, and the end of the screw rod is rotatably connected to the end bearing; a threaded hole is provided in the middle of the vertical moving block and is threadedly connected to the screw rod; the horizontal moving seat assembly includes: a horizontal moving seat and a connecting rod; the two ends of the connecting rod are respectively hingedly connected to the vertical moving block and the horizontal moving seat; when the servo motor drives the screw rod to rotate, the vertical moving block can move up and down, thereby causing the horizontal moving seat to move in the horizontal plane;

[0019] The four horizontal movable seat assemblies have the same structure and are evenly distributed around the vertical axis of the screw rod. The inclination angles between the connecting rods and the screw rods of the four horizontal movable seat assemblies are the same, so that when the vertical moving block moves, the moving distances of the four horizontal movable seats are the same.

[0020] The relationship between the jaw distance adjustment assembly and the sample shape adjustment member is as follows: the four sample shape adjustment members are respectively arranged on the four horizontal movable seat assemblies; the moving direction of the pneumatic jaws of the four sample shape adjustment members is the same as the moving direction of the four horizontal movable seats;

[0021] The vertical center line of the screw rod passes through the center of the circular array of the four sample shape adjustment members.

[0022] Furthermore, the vertical moving block is disposed between the first horizontal plate and the second horizontal plate.

[0023] Furthermore, the horizontally movable seat assembly further includes a guide rail, which is fixed on the second horizontal plate, and the horizontally movable seat can be engaged with the guide rail.

[0024] A method for measuring the diameter parameters of a carbon fiber tube comprises the following steps:

[0025] S100, place the carbon fiber tube on the four sample placement seats, with the central axis of the carbon fiber tube coinciding with the axis of the screw;

[0026] S200, obtaining the theoretical circular diameter of the carbon fiber tube and determining whether the carbon fiber tube is qualified; S200 includes the following sub-steps:

[0027] S201, obtaining a long diameter A and a short diameter B of the carbon fiber tube in an unconstrained state by a visual measurement component;

[0028] S202, calculate the circumference L: L = Aπ / 3 + 2Bπ / 3;

[0029] S203, solve the theoretical circular diameter d of the carbon fiber tube: d = L / π;

[0030] S204, judging whether it is qualified:

[0031] If d is in (d 阈值1 , d 阈值2 ) is qualified, go to step S300; d 阈值1 , d 阈值2 Indicates the lower and upper diameter threshold values of the carbon fiber tube;

[0032] Otherwise, you will fail and exit the test directly;

[0033] S300, obtaining the actual circular diameter parameter of the carbon fiber cylinder, which includes the following sub-steps:

[0034] At step S301, the pressure P of the four pneumatic grippers is gradually adjusted to ΔP, 2ΔP, 3ΔP, ... nΔP, and the roundness, major diameter, and minor diameter parameters under these different pressures are measured using a visual measurement component. ΔP represents the step pneumatic pressure, and n represents the number of steps tested.

[0035] S302, determine whether the test is correct:

[0036] As P increases, if the roundness shows a trend of first decreasing and then increasing, the test is successful and the process goes to step S303;

[0037] Otherwise, the test is unsuccessful, and the process returns to step S100 and retests.

[0038] S303, determining the actual circular diameter parameters of the carbon fiber tube: recording the pneumatic gripper pressure, major diameter, and minor diameter when the circularity is minimum.

[0039] Furthermore, △P=0.05MPa.

[0040] Furthermore, the value range of n△P is [0.7 MPa, 1.0 MPa].

[0041] Furthermore, step S100 also includes: adjusting the clamping jaw distance adjustment component according to the size of the carbon fiber tube.

[0042] A method for pairing a carbon fiber cylinder with a turbine rotor comprises the following steps:

[0043] First, obtain the diameter parameter of the turbine rotor: the long diameter d 涡轮长直径、 Short diameter d 涡轮短直径 ;

[0044] Secondly, obtain the diameter parameters of the carbon fiber tube: long diameter d 碳纤维筒长直径 , short diameter d 碳纤维筒短直径 ;

[0045] Again, determine whether pairing is possible:

[0046] If: d 碳纤维筒长直径 -d 涡轮短直径 <Gap Threshold max , d 碳纤维筒短直径 -d 涡轮长直径 >Gap Threshold min , the pairing is successful;

[0047] Otherwise, the pairing is unsuccessful;

[0048] Among them, the gap threshold max , gap threshold min Respectively represent the upper and lower limits of the gap threshold.

[0049] The beneficial effects of this application are:

[0050] (1) The basic inventive concept of this application is to provide a carbon fiber tube diameter parameter measurement tool, the core ideas of which are the following two points:

[0051] 1.1. The center of the carbon fiber tube is inconsistent with the center of the circular array of the four sample shape adjustment components, which will cause the shape of the carbon fiber tube to not become circular when squeezed. To this end, this application adopts "the pneumatic pressure of the four pneumatic grippers in parallel, that is, when working, the pneumatic pressure of the four pneumatic grippers is the same". When the pneumatic grippers are working, their air pressure is adjusted in steps, that is, △P, 2△P, 3△P, ... n△P are gradually adjusted. During measurement, the center of the carbon fiber tube can be fine-tuned through the four pneumatic grippers so that the center of the carbon fiber tube is close to the center of the circular array of the four sample shape adjustment components.

[0052] 1.2. The diameter of the carbon fiber tube is measured by combining the "visual measurement component and four sample shape adjustment components".

[0053] Specifically, the shape of the carbon fiber tube is squeezed by four sample shape adjustment members evenly arranged around the tube's circumference, and the visual measurement component measures the tube's roundness in real time. Specifically, the roundness of the corresponding carbon fiber tube is measured when the pneumatic gripper pressure is set to △P (△P represents the pneumatic pressure step), 2△P, 3△P, ... n△P. The roundness decreases from large to small and then to large again. The major and minor diameters measured at the minimum roundness are then paired with the turbine rotor.

[0054] (2) There are many models of carbon fiber cylinders. The adjustment length of the pneumatic clamping jaws of the sample shape adjustment component may be insufficient. Therefore, the design of the clamping jaw distance adjustment component is added.

[0055] The key coordination relationship between the clamping jaw distance adjustment assembly and the four sample shape adjustment components is: "The four horizontal movable seat assemblies have the same structure and are evenly distributed around the vertical axis of the screw; the inclination angles between the connecting rods and the screw of the four horizontal movable seat assemblies are the same, so that when the vertical movement is fast, the movement distances of the four horizontal movable seats are the same", "The vertical center line of the screw passes through the center of the circular array of the four sample shape adjustment components", and "The four sample shape adjustment components are respectively arranged on the four horizontal movable seat assemblies, and the movement directions of the pneumatic clamping jaws of the four sample shape adjustment components are respectively the same as the movement directions of the corresponding four horizontal movable seats". Based on the above common design, it is ensured that no matter how the horizontal movable seat moves, the center of the circular array of the four sample shape adjustment components coincides with the projection point of the vertical axis of the screw on the horizontal plane.

[0056] (3) This application also provides a method for measuring the diameter parameters of a carbon fiber tube, which includes the following steps:

[0057] S100, place the carbon fiber tube on the four sample placement seats, with the central axis of the carbon fiber tube coinciding with the axis of the screw;

[0058] S200, obtaining the theoretical circular diameter of the carbon fiber tube and determining whether the carbon fiber tube is qualified: if qualified, continue the test; if unqualified, exit the test directly;

[0059] S300: Using the measuring tool of the present application to obtain the actual circular diameter parameter of the carbon fiber cylinder.

[0060] For the theoretical circle diameter, it is difficult to calculate the circumference of the inner surface under unconstrained conditions. In this regard, after fitting tests, it was found that: R=b+4(ab)θ 2 / π 2 is a suitable expression, and it can be integrated to obtain an analytical solution.

[0061] (4) This application also proposes a method for pairing a carbon fiber tube with a turbine rotor, which measures the diameter parameters of the carbon fiber tube based on the diameter parameter measuring tool of the carbon fiber tube of this application.

[0062] Specifically, it includes the following steps:

[0063] First, obtain the diameter parameter of the turbine rotor: the long diameter d 涡轮长直径、 Short diameter d 涡轮短直径 ;

[0064] Secondly, obtain the diameter parameters of the carbon fiber tube: long diameter d 碳纤维筒长直径 , short diameter d 碳纤维筒短直径 ;

[0065] Again, determine whether pairing is possible:

[0066] If: d 碳纤维筒长直径 -d 涡轮短直径 <Gap Threshold max , d 碳纤维筒短直径 -d 涡轮长直径 >Gap Threshold min , the pairing is successful;

[0067] Otherwise, the pairing is unsuccessful;

[0068] Among them, the gap threshold max , gap threshold min Respectively represent the upper and lower limits of the gap threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The present application will be further described in detail below with reference to the embodiments in the accompanying drawings, but this does not constitute any limitation to the present application.

[0070] Figure 1 This is a cross-sectional diagram of the compound molecular pump.

[0071] Figure 2It is a schematic diagram of the projection trajectory of the inner surface of the carbon fiber cylinder determined in this application on the horizontal plane.

[0072] Figure 3 It is a schematic diagram of the three-dimensional structural design of the carbon fiber tube diameter parameter measurement tooling of the present application.

[0073] Figure 4 It is a schematic diagram of the three-dimensional structural design of the clamping jaw distance adjustment component of the present application.

[0074] Figure 5 It is a schematic diagram of the vertical structural design of the clamping jaw distance adjustment assembly of the present application.

[0075] Figure 6 It is a schematic diagram of the three-dimensional structural design of the horizontal moving seat assembly of the present application.

[0076] Figure 7 It is a schematic diagram of the three-dimensional design of the sample shape adjustment component of this application.

[0077] Figure 8 It is a three-dimensional design schematic diagram of the sample shape adjustment component, clamping jaw distance adjustment component, and carbon fiber tube of this application.

[0078] The reference numerals are as follows:

[0079] Dynamic traction cylinder 100, turbine rotor 200;

[0080] Carbon fiber tube diameter parameter measurement tool 300;

[0081] Visual measurement component 310, jaw distance adjustment component 320, sample shape adjustment component 330;

[0082] Servo motor 321, first horizontal plate 322, second horizontal plate 323, vertical connecting rod 324, vertical moving block 325, end bearing 326, screw rod 327, horizontal moving seat assembly 328, horizontal moving seat 3281, connecting rod 3282, guide rail 3283;

[0083] Sample placement seat 331 and pneumatic clamping jaws 332. DETAILED DESCRIPTION

[0084] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0085] <R&D Difficulties>

[0086] When the carbon fiber tube is first delivered, it has a curved cross-section. During use, it is extruded into a circular shape. Existing methods cannot measure the circular diameter of the carbon fiber tube when it is first delivered.

[0087] <1. Solution>

[0088] (1) Theoretical circular diameter of carbon fiber tube

[0089] The cross-section of a carbon fiber cylinder is not circular when it is initially delivered. During use, it is extruded into a circular shape. During this process, the length of the inner surface of the cylinder remains essentially unchanged. Based on this concept, an expression for the inner surface trajectory of a horizontal cross-section of the cylinder is analyzed. To determine the theoretical circular diameter, the parameters of the incoming carbon fiber cylinder are first measured, then the circumference of the trajectory is calculated. Finally, the theoretical circular diameter is calculated using the constant circumference.

[0090] The inner surface trajectory of the horizontal section of the carbon fiber tube can be expressed as follows (e.g. Figure 2 As shown, b=200mm, a=205mm):

[0091] The first quadrant can be expressed as: ; The curve lengths of the second, third, and fourth quadrants are the same as those of the first quadrant.

[0092] The above conversion to polar coordinates can be expressed as:

[0093] The first quadrant can be expressed as: R = b + 4 (ab) θ 2 / π 2 (0≤θ≤π / 2).

[0094] From this we can see that the curve length L is:

[0095] .

[0096] That is, the solution to the theoretical circular diameter of the carbon fiber tube is:

[0097] First, measure the long radius a and short radius b of the inner surface of the incoming carbon fiber tube;

[0098] Then, find the perimeter L of the curve: L = 2aπ / 3 + 4bπ / 3.

[0099] Next, solve the circular diameter d of the carbon fiber tube after being extruded: d=L / π.

[0100] (2) Actual circular diameter of carbon fiber cylinder

[0101] The carbon fiber tube needs to be extruded to become a circle, that is, two sets of XY components are set on the carbon fiber tube for extrusion, so as to perform measurement.

[0102] <2. A carbon fiber tube diameter parameter measurement tool>

[0103] like Figure 3 As shown, a carbon fiber tube diameter parameter measuring tool 300 is used to measure the diameter of a carbon fiber tube, comprising:

[0104] a, a visual measurement component 310, which is used to measure the roundness of the carbon fiber tube in real time (roundness is the difference between the long diameter and the short diameter);

[0105] b, the jaw distance adjustment component 320 is used to adjust the position of the sample shape adjustment component 330.

[0106] c, a sample shape adjustment assembly 330, which is used to extrude the carbon fiber cylinder into a round shape.

[0107] Figure 4 A three-dimensional design diagram of the jaw distance adjustment assembly 320 is shown. Figure 5 The vertical schematic diagram of the clamping jaw distance adjustment assembly 320 is shown. The clamping jaw distance adjustment assembly 320 includes: a servo motor 321, a first horizontal plate 322, a second horizontal plate 323, a vertical connecting rod 324, a vertical moving block 325, an end bearing 326, a screw rod 327, and four horizontal moving seat assemblies 328;

[0108] The housing of the servo motor 321 is fixedly connected to the first horizontal plate 322 , and the first horizontal plate 322 and the second horizontal plate 323 are fixedly connected to form a whole through the vertical connecting rod 324 ;

[0109] The output shaft of the servo motor 321 is connected to the screw rod 327. An end bearing 326 is fixedly provided on the side of the second horizontal plate 323 facing the first horizontal plate 322. The end of the screw rod 327 is rotatably connected to the end bearing 326.

[0110] A threaded hole is provided in the middle of the vertical moving block 325 and is threadedly connected to the screw rod 327 ; the vertical moving block 325 is disposed between the first horizontal plate 322 and the second horizontal plate 323 .

[0111] Figure 6The diagram illustrates the three-dimensional structure of the horizontal movable seat assembly. Each horizontal movable seat assembly 328 comprises a horizontal movable seat 3281, a connecting rod 3282, and a guide rail 3283. The guide rail 3283 is fixed to the second horizontal plate 323, and the horizontal movable seat 3281 can engage with the guide rail 3283. The ends of the connecting rod 3282 are hingedly connected to the vertical movable block 325 and the horizontal movable seat 3281, respectively. When the servo motor 321 drives the screw rod 327 to rotate, the vertical movable block 325 can move up and down, causing the horizontal movable seat 3281 to move along the guide rail 3283.

[0112] The four horizontal moving seat assemblies are divided into two groups of horizontal moving seat assemblies. The moving directions of the horizontal moving seats of each group of horizontal moving seat assemblies are the same, and the moving directions of the horizontal moving seats of the two groups of horizontal moving seat assemblies are perpendicular to each other.

[0113] Figure 7 The schematic diagram illustrates the structural design of the sample shape adjustment assembly. The sample shape adjustment assembly 330 comprises four sample shape adjustment components, each mounted on one of four horizontally movable base assemblies. These components include a sample holder 331 and pneumatic grippers 332. The sample holder 331 is positioned on the upper surface of the horizontally movable base, and the pneumatic grippers 332 are mounted on top of the holder 331. The four sample shape adjustment components are divided into two groups, with the pneumatic grippers in each group moving in the same, corresponding direction. The movement directions of the two groups are perpendicular to each other.

[0114] The above embodiments are preferred implementation modes of the present application and are only used to facilitate the explanation of the present application. They are not intended to limit the present application in any form. Any person with ordinary knowledge in the relevant technical field, if they do not depart from the scope of the technical features proposed in the present application, can make equivalent embodiments by making partial changes or modifications to the technical content disclosed in the present application, and they do not depart from the technical features of the present application. They are still within the scope of the technical features of the present application.

Claims

1. A method for measuring the diameter parameters of a carbon fiber tube, characterized in that: The carbon fiber cylinder is a dynamic traction cylinder of the composite molecular pump, and the diameter parameter of the carbon fiber cylinder is measured by using a carbon fiber cylinder diameter parameter measuring tool; The carbon fiber tube diameter parameter measurement tool comprises: a visual measurement component and four sample shape adjustment components; the visual measurement component is used to obtain the long diameter, short diameter and roundness of the carbon fiber tube; in the initial state, the four sample shape adjustment components are arranged in a circular array and are distributed around the carbon fiber tube; the sample shape adjustment components include a sample placement seat and a pneumatic clamp; the four sample placement seats together serve as a placement base for the carbon fiber tube; the four pneumatic clamps can squeeze / relax the carbon fiber tube by extending / contracting, thereby adjusting the roundness of the carbon fiber tube; wherein the pneumatic pressure of the four pneumatic clamps is connected in parallel, that is, when working, the pneumatic pressure of the four pneumatic clamps is the same; The steps include: S100, place the carbon fiber tube on the four sample placement seats, with the central axis of the carbon fiber tube coinciding with the axis of the screw; S200, obtaining the theoretical circular diameter of the carbon fiber tube and determining whether the carbon fiber tube is qualified; S200 includes the following sub-steps: S201, obtaining a long diameter A and a short diameter B of the carbon fiber tube in an unconstrained state by a visual measurement component; S202, calculate the circumference L: L = Aπ / 3 + 2Bπ / 3; S203, solve the theoretical circular diameter of the carbon fiber tube: d = L / π; S204, judging whether it is qualified: If d is in (d 阈值1 , d 阈值2 ) is qualified, go to step S300; d 阈值1 , d 阈值2 Indicates the lower and upper diameter threshold values of the carbon fiber tube; Otherwise, you will fail and exit the test directly; S300, obtaining the actual circular diameter parameter of the carbon fiber cylinder, which includes the following sub-steps: At step S301, the pressure P of the four pneumatic grippers is gradually adjusted to ΔP, 2ΔP, 3ΔP, ... nΔP, and the roundness, major diameter, and minor diameter parameters under these different pressures are measured using a visual measurement component. ΔP represents the step pneumatic pressure, and n represents the number of steps tested. S302, determine whether the test is correct: As P increases, if the roundness shows a trend of first decreasing and then increasing, the test is successful and the process goes to step S303; Otherwise, the test is unsuccessful, and the process returns to step S100 and retests. S303, determining the actual circular diameter parameters of the carbon fiber tube: recording the pneumatic gripper pressure, major diameter, and minor diameter when the circularity is minimum.

2. The method for measuring the diameter parameters of a carbon fiber tube according to claim 1, characterized in that: The moving direction of the four pneumatic grippers is the radial direction of the circular array.

3. The method for measuring the diameter parameters of a carbon fiber tube according to claim 1, characterized in that: The carbon fiber tube diameter parameter measurement tool further includes: a clamping jaw distance adjustment component for adjusting the positions of four sample shape adjustment components; The clamping jaw distance adjustment assembly includes: a servo motor, a first horizontal plate, a second horizontal plate, a vertical connecting rod, a vertical moving block, an end bearing, a screw rod, and four horizontal moving seat assemblies; the housing of the servo motor is fixedly connected to the first horizontal plate, and the first horizontal plate and the second horizontal plate are fixedly connected to each other as a whole through the vertical connecting rod; the output shaft of the servo motor is connected to the screw rod, and the end bearing is fixedly provided on the side of the second horizontal plate facing the first horizontal plate, and the end of the screw rod is rotatably connected to the end bearing; a threaded hole is provided in the middle of the vertical moving block and is threadedly connected to the screw rod; the horizontal moving seat assembly includes: a horizontal moving seat and a connecting rod; the two ends of the connecting rod are respectively hingedly connected to the vertical moving block and the horizontal moving seat; when the servo motor drives the screw rod to rotate, the vertical moving block can move up and down, thereby causing the horizontal moving seat to move in the horizontal plane; The four horizontal movable seat assemblies have the same structure and are evenly distributed around the vertical axis of the screw rod. The inclination angles between the connecting rods and the screw rods of the four horizontal movable seat assemblies are the same, so that when the vertical moving block moves, the moving distances of the four horizontal movable seats are the same. The relationship between the jaw distance adjustment assembly and the sample shape adjustment member is as follows: the four sample shape adjustment members are respectively arranged on the four horizontal movable seat assemblies; the moving direction of the pneumatic jaws of the four sample shape adjustment members is the same as the moving direction of the four horizontal movable seats; The vertical center line of the screw rod passes through the center of the circular array of the four sample shape adjustment members.

4. The method for measuring the diameter parameters of a carbon fiber tube according to claim 3, characterized in that: The vertical moving block is disposed between the first horizontal plate and the second horizontal plate.

5. The method for measuring the diameter parameters of a carbon fiber tube according to claim 3, characterized in that: The horizontally movable seat assembly further includes a guide rail, which is fixed on the second horizontal plate, and the horizontally movable seat can be engaged with the guide rail.

6. The method for measuring the diameter parameters of a carbon fiber tube according to claim 1, characterized in that: △P=0.05MPa.

7. The method for measuring diameter parameters of a carbon fiber tube according to claim 6, wherein: The value range of n△P is [0.7 MPa, 1.0 MPa].

8. A method for pairing a carbon fiber cylinder with a turbine rotor, characterized in that: The steps include: First, obtain the diameter parameter of the turbine rotor: the long diameter d 涡轮长直径、 Short diameter d 涡轮短直径 ; Next, the diameter parameters of the carbon fiber tube are obtained by the measurement method as claimed in claim 1: the long diameter d 碳纤维筒长直径 , short diameter d 碳纤维筒短直径 ; Again, determine whether pairing is possible: If: d 碳纤维筒长直径 -d 涡轮短直径 <Gap Threshold max , d 碳纤维筒短直径 -d 涡轮长直径 >Gap Threshold min , the pairing is successful; Otherwise, the pairing is unsuccessful; Among them, the gap threshold max , gap threshold min Respectively represent the upper and lower limits of the gap threshold.

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