Horizontal-split-free double-barrel-shaped cylinder center laser alignment method

Abstract

The invention provides a laser alignment method for the center of a double-barrel-shaped cylinder without a horizontal split, and aims to overcome the defect that the centers of an inner cylinder and an outer cylinder cannot be measured in a traditional steel wire alignment mode when an ultrahigh-pressure inner cylinder is in a vertical state, and meanwhile, the influence of deformation of a supporting arm on the center of the cylinder needs to be considered. The invention belongs to the field of steam turbine cylinder center alignment, and through operation of a laser measuring instrument on a cylinder structure, measurement reference selection, a center reference coordinate system establishment method, a measurement state, measurement requirements and inner and outer cylinder center data processing, a cylinder center value is conveniently, quickly and accurately obtained, an inner cylinder is adjusted, the inner cylinder alignment time is shortened, and the efficiency is improved. And the aim of improving the alignment efficiency of the ultrahigh-pressure cylinder is fulfilled.

Description

Technical Field

[0001] The invention belongs to the field of turbine cylinder center alignment, and particularly relates to a laser alignment method for the center of a double-cylinder cylinder without a horizontal center dividing surface. Background Art

[0002] The fully cylindrical steam turbine's ultra-high-pressure outer cylinder consists of front and rear cylindrical cylinders without a horizontal center plane, connected by vertical center plane bolt holes. Its inner cylinder is an upper and lower semi-cylindrical cylinder structure, clamped by a red sleeve ring on the outside of the inner cylinder. Due to the structural characteristics of the outer cylinder, the front and rear sections of the ultra-high-pressure outer cylinder can only be connected and centered in a vertical state. After the ultra-high-pressure inner cylinder red sleeve is vertically installed into the front section of the ultra-high-pressure outer cylinder, the centers of the inner and outer cylinders must also be aligned in a vertical state. However, the traditional wire centering method cannot be used to measure the centers of the inner and outer cylinders in a vertical state. On the other hand, the cylindrical inner cylinder is supported on the outer cylinder by four cantilever support arms, and the influence of the support arm deformation on the cylinder center must be considered. Therefore, it is necessary to develop a better method for aligning the center of the cylindrical cylinder. Summary of the Invention

[0003] In view of the problems and shortcomings of the current cylindrical cylinder center alignment method, the present invention provides a double-cylinder cylinder center laser alignment method without a horizontal center plane. The method uses a laser measuring instrument to operate the cylinder structure, measurement reference selection, center reference coordinate system establishment method, measurement status, measurement requirements, and inner and outer cylinder center data processing, so as to obtain the cylinder center value conveniently, quickly and accurately and adjust the inner cylinder, shorten the inner cylinder alignment time, and thus improve the ultra-high pressure cylinder alignment efficiency.

[0004] The technical solutions adopted by the present invention to solve the technical problems are as follows: A laser alignment method for the center of a double-cylinder cylinder without a horizontal center plane includes a vertical state ultra-high pressure inner and outer cylinder center measurement method and a horizontal state ultra-high pressure inner and outer cylinder center measurement method.

[0005] Among them, the method for measuring the center of the vertical ultra-high pressure inner and outer cylinders is to use a laser measuring instrument to measure the center of the ultra-high pressure inner and outer cylinders, and use the center of the installation hole of the front section steam seal body of the outer cylinder as the reference to find the center of the inner cylinder.

[0006] Measurement status: The ultra-high pressure inner cylinder red sleeve is vertically installed into the front section of the outer cylinder, and the process adjustment gasket is installed at the center key position of the inner and outer cylinders. The axial positioning dimensions of the inner and outer cylinders are qualified.

[0007] Measuring point locations: the innermost and outermost minimum diameter inner hole circles of the installation holes of the steam seal body at the front section of the outer cylinder, the concentric assembly measuring point at the steam seal end of the inner cylinder, and the concentric assembly measuring point at the exhaust end of the inner cylinder.

[0008] Measurement requirements: Set up a laser measuring instrument at the bottom of the front section of the ultra-high pressure outer cylinder, and measure points on the inner holes of each measuring point in the cylindrical measurement mode. The number of points taken for each inner hole shall be no less than 12.

[0009] Data processing: In the laser measurement software, a reference coordinate system is established with the centers of the two cylinders on the outer cylinder. The coordinate values ​​of the centers of the cylinders at both ends of the inner cylinder in the reference coordinate system are read out respectively. According to the correspondence between the coordinate axis and the up and down and left and right directions of the cylinder, the cylinder center is judged to be qualified and the position of the inner cylinder is adjusted according to the coordinate values.

[0010] Among them, the method for measuring the center of the ultra-high pressure inner and outer cylinders in the horizontal state is to use a laser measuring instrument to measure the center of the ultra-high inner and outer cylinders, and use the center of the installation hole of the front and rear sections of the steam seal body of the outer cylinder as the reference to align the center of the inner cylinder respectively.

[0011] Measuring state: The inner and outer cylinders are supported horizontally on the bearing box.

[0012] Measuring point locations: the smallest diameter inner hole circles at the innermost and outermost sides of the installation holes of the steam seal bodies at the front and rear sections of the outer cylinder, the concentric assembly measuring point at the steam seal end of the inner cylinder, and the concentric assembly measuring point at the exhaust end of the inner cylinder.

[0013] Measurement requirements: Set up laser measuring instruments at both ends of the ultra-high pressure outer cylinder, and measure points on the inner hole of each measuring point in the cylindrical measurement mode. The number of points taken on each inner hole shall be no less than 12.

[0014] Data processing: In the laser measurement software, the reference coordinate systems are established respectively with the center of the measuring cylinders on the front and rear sections of the outer cylinder. The coordinate values ​​of the center of the cylinders at both ends of the inner cylinder in their respective corresponding reference coordinate systems are read out. According to the correspondence between the coordinate axis and the up and down and left and right directions of the cylinder, the cylinder center is judged to be qualified and the position of the inner cylinder is adjusted according to the coordinate values.

[0015] The laser alignment method for the center of a double-cylinder cylinder without a horizontal center plane provided by the present invention further preferably comprises the following steps: (1) A laser measuring instrument is set up at the middle position of the bottom of the front section of the ultra-high pressure outer cylinder, and the laser measuring target ball is tested by computer measurement software to see if it can receive laser signals at all measuring points of the outer cylinder and the inner cylinder; (2) Place the laser measuring target ball on the inner holes of the outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, and inner cylinder measuring point 2 and take points. The number of points taken on each inner hole shall not be less than 12 points. (3) In the measurement software, select the centers of the two cylinders, outer cylinder datum 1 and outer cylinder datum 2, to establish a central axis. With the central axis as the Z1 axis and the center of the outer cylinder datum 1 as the coordinate origin, establish a spatial reference coordinate system I. The X axis of the coordinate system I points to the upper side of the outer cylinder, and the Y axis points to the left side of the outer cylinder. (4) The center of the cylinder at measuring point 1 of the inner cylinder is named C1, and the center of the cylinder at measuring point 2 of the inner cylinder is named D1. The coordinate values ​​of the centers of the inner cylinders in the reference coordinate system I are read respectively: C1(X1, Y1, Z1) and D1(X2, Y2, Z2); (5) The actual deviation of the inner cylinder relative to the outer cylinder center is determined by the X and Y coordinate values ​​of the circle center C1 and the circle center D1. Then, the center key process is adjusted according to the deviation value to adjust the thickness of the gasket to adjust the center of the inner cylinder until the concentricity tolerance of the inner and outer cylinder centers is 0.05 mm. The coordinate value X represents the center deviation of the inner cylinder relative to the outer cylinder in the vertical direction, and the coordinate value Y represents the center deviation of the inner cylinder relative to the outer cylinder in the left and right direction. (6) Repeat steps (1) to (5), re-measure the center of the inner and outer cylinders until they are qualified, then fasten the rear section of the outer cylinder and tighten the connecting bolts of the outer cylinder center surface; (7) Place the laser measuring target ball on the inner holes of outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, inner cylinder measuring point 2, outer cylinder datum 3, and outer cylinder datum 4 and take points. The number of points taken on each inner hole shall not be less than 12 points. (8) In the measurement software, establish a central axis with the center of the cylinder of outer cylinder datum 1 and outer cylinder datum 2. With the central axis as the Z2 axis and the center of the cylinder of outer cylinder datum 1 as the coordinate origin, establish a spatial reference coordinate system II, with the X axis pointing to the upper side of the cylinder and the Y axis pointing to the left side of the cylinder. Read the coordinate value C3 (X3, Y3, Z3) of the center of the cylinder of inner cylinder measuring point 1 in coordinate system II. (9) Establish the central axis with the center of the cylinder of outer cylinder datum 3 and outer cylinder datum 4. Establish the spatial reference coordinate system III with the central axis as the Z3 axis and the center of the cylinder of outer cylinder datum 4 as the origin. The X axis points to the upper side of the cylinder and the Y axis points to the right side of the cylinder. Read the coordinate value D4 (X4, Y4, Z4) of the center of the cylinder of inner cylinder measuring point 2 in coordinate system III. (10) The X and Y coordinate values ​​of the inner cylinder measuring point 1 and the inner cylinder measuring point 2 are within the range of ±0.05mm (the absolute values ​​of X3, Y3, X4, and Y4 are all less than 0.05mm), and the inner and outer cylinder centers are qualified; (11) Turn the cylinder from a vertical position to a horizontal position and support it on the bearing box; (12) Set up laser measuring instruments on the motor side and turbine side of the outer cylinder respectively, and place the laser measuring target ball on the inner holes of the outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, inner cylinder measuring point 2, outer cylinder datum 3, and outer cylinder datum 4 to take points. The number of points taken on each inner hole shall not be less than 12 points. (13) In the measurement software, establish a central axis with the center of the cylinder of outer cylinder datum 1 and outer cylinder datum 2, establish a spatial reference coordinate system IV with the center axis as Z4 axis and the center of the cylinder of outer cylinder datum 1 as the coordinate origin, with the X axis pointing to the upper side of the cylinder and the Y axis pointing to the left side of the cylinder, read the coordinate value C5 (X5, Y5, Z5) of the center of the cylinder of inner cylinder measuring point 1 in coordinate system IV, establish a central axis with the center of the cylinder of outer cylinder datum 3 and outer cylinder datum 4, with the center axis as Z5 axis and the center of the cylinder of outer cylinder datum 4 as the origin Establish spatial reference coordinate system V, with the X-axis pointing to the upper side of the cylinder and the Y-axis pointing to the right side of the cylinder. Read the coordinate value D6 (X6, Y6, Z6) of the center of the cylinder of the inner cylinder measuring point 2 in coordinate system V. Read the center coordinate value C5 (X5, Y5, Z5) of the inner cylinder measuring point 1 in the horizontal state, and the center coordinate value D6 (X6, Y6, Z6) of the inner cylinder measuring point 2. Among them, X3-X5 and X4-X6 represent the subsidence of the center of the inner cylinder measuring point relative to the center of the outer cylinder. When the inner cylinder is vertically centered, the center of the inner cylinder must be compensated for the subsidence in advance. (14) The cylinder is turned from the horizontal state to the vertical state, and the center of the inner cylinder is adjusted by aligning the thickness of the center key process gasket. The laser measurement target ball is placed on the inner holes of the outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, and inner cylinder measuring point 2 to take points. The number of points taken for each inner hole is not less than 12 points; in the measurement software, the centers of the two cylinders of outer cylinder datum 1 and outer cylinder datum 2 are selected to establish a central axis. The central axis is used as the Z6 axis, and the center of the outer cylinder datum 1 is used as the coordinate origin to establish a spatial reference coordinate system VI. The X axis of the coordinate system VI points outward. On the upper side of the cylinder, the Y axis points to the left side of the outer cylinder; the cylindrical center of the inner cylinder measuring point 1 is named C7, and the cylindrical center of the inner cylinder measuring point 2 is named D8. The coordinate values ​​of each center of the inner cylinder in the reference coordinate system I are read respectively: C7 (X7, Y7, Z7) and D8 (X8, Y8, Z8); the actual deviation of the inner cylinder relative to the outer cylinder center is judged by the X and Y coordinate values ​​of the center C7 and the center D8. At this time, the vertical offset of the inner cylinder relative to the outer cylinder center should be equal to the sinking amount of the inner and outer cylinders in the horizontal state. The centers of the inner and outer cylinders are qualified in the horizontal state.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects: For cylinders with a double-cylinder structure, it is no longer necessary to design special measuring fixtures due to the influence of the measurement state. Laser measurement can be used to align the cylinder center in both vertical and horizontal states. The measurement method is simple, easy to operate, and the measurement data is highly accurate, which can effectively improve the assembly efficiency of the unit. This centering method can provide a reference for the installation and adjustment of other units with similar structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the double-barrel cylinder structure without horizontal center dividing plane; Figure 2 Schematic diagram of the cross-sectional structure of a double-barrel cylinder without a horizontal center dividing plane; Figure 3 It is a schematic diagram of the structure of the cylinder support arm in the cylinder; Figure 4 This is a schematic diagram of the centering measurement of the front section of the outer cylinder in the vertical state of the cylinder; Figure 5 This is a schematic diagram of the centering measurement of the rear section of the outer cylinder in the vertical state of the cylinder; Figure 6 This is a schematic diagram of the centering measurement of the cylinder horizontal state; Figure 7 Schematic diagram of establishing a reference coordinate system for the outer cylinder in the horizontal state of the cylinder; In the figure: inner cylinder 1, outer cylinder front section 3, outer cylinder rear section 4, support arm 5. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described in more detail below in conjunction with the drawings of a certain embodiment of the present invention. It should be noted that the described embodiment is exemplary and only represents one embodiment of the technical solution of the present invention. The purpose is to more clearly and conveniently describe and explain the technical solution of the present invention. Therefore, the described embodiment does not represent all embodiments of the present invention and cannot be regarded as a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative changes should fall within the scope of protection of the present invention.

[0019] Example 1 A laser alignment method for the center of a double-cylinder cylinder without a horizontal center plane comprises the following steps: (1) A laser measuring instrument is set up at the middle position of the bottom of the front section of the ultra-high pressure outer cylinder, and the laser measuring target ball is tested by computer measurement software to see if it can receive laser signals at all measuring points of the outer cylinder and the inner cylinder; (2) Place the laser measuring target ball on the inner holes of the outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, and inner cylinder measuring point 2 and take points. The number of points taken on each inner hole shall not be less than 12 points. (3) In the measurement software, select the centers of the two cylinders, outer cylinder datum 1 and outer cylinder datum 2, to establish a central axis. With the central axis as the Z1 axis and the center of the outer cylinder datum 1 as the coordinate origin, establish a spatial reference coordinate system I. The X axis of the coordinate system I points to the upper side of the outer cylinder, and the Y axis points to the left side of the outer cylinder. (4) The center of the cylinder at measuring point 1 of the inner cylinder is named C1, and the center of the cylinder at measuring point 2 of the inner cylinder is named D1. The coordinate values ​​of the centers of the inner cylinders in the reference coordinate system I are read respectively: C1 (0.088, -0.138, 468.270) and D1 (0.020, -0.235, 4244.826); (5) The actual deviation of the inner cylinder relative to the outer cylinder center is judged by the X and Y coordinate values ​​of the center of the circle C1 and the center of the circle D1: the X coordinate value of the center of the circle C1 is 0.088, which means that the inner cylinder measuring point 1 is 0.088 mm upward relative to the outer cylinder reference circle center. The Y coordinate value of the center of the circle C1 is -0.138, which means that the inner cylinder measuring point 1 is 0.138 mm rightward relative to the outer cylinder reference circle center. The X coordinate value of the center of the circle D1 is 0.02, which is less than 0.05, indicating that the concentricity of the inner cylinder measuring point 2 relative to the outer cylinder reference circle center in the vertical direction is qualified. The Y coordinate value of the center of the circle D1 is -0.235, which means that the inner cylinder measuring point 2 is 0.235 mm rightward relative to the outer cylinder reference circle center. To ensure the concentricity tolerance of the inner and outer cylinder centers is 0.05mm, that is, the X and Y coordinate values ​​of the center C1 and D1 are within the range of ±0.05, the inner cylinder measuring point 1 is adjusted downward by 0.08mm and to the left by 0.138mm, and the inner cylinder measuring point 2 is adjusted to the left by 0.235mm. According to the adjustment value, the center key process is adjusted to adjust the thickness of the gasket to adjust the center of the inner cylinder; (6) Repeat steps (1) to (5) to measure the center of the circle C1 (0.035, 0.038, 468.291) of the inner cylinder measuring point 1 and the center of the circle D1 (0.041, -0.027, 4244.824) of the inner cylinder measuring point 2. The X and Y coordinate values ​​of the centers C1 and D1 are within the range of ±0.05. The centers of the inner and outer cylinders are qualified. Then, fasten the rear section of the outer cylinder and tighten the connecting bolts of the outer cylinder center plane. (7) Place the laser measuring target ball on the inner holes of outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, inner cylinder measuring point 2, outer cylinder datum 3, and outer cylinder datum 4 and take points. The number of points taken on each inner hole shall not be less than 12 points. (8) In the measurement software, establish a central axis with the center of the cylinder of outer cylinder datum 1 and outer cylinder datum 2. With the central axis as the Z2 axis and the center of the cylinder of outer cylinder datum 1 as the coordinate origin, establish a spatial reference coordinate system II, with the X axis pointing to the upper side of the cylinder and the Y axis pointing to the left side of the cylinder. Read the coordinate value C3 (0.035, 0.038, 468.260) of the center of the cylinder of inner cylinder measuring point 1 in coordinate system II. (9) Establish the central axis with the center of the cylinder of outer cylinder datum 3 and outer cylinder datum 4. Establish the spatial reference coordinate system III with the central axis as the Z3 axis and the center of the cylinder of outer cylinder datum 4 as the origin. The X axis points to the upper side of the cylinder and the Y axis points to the right side of the cylinder. Read the coordinate value D4 (0.045, -0.015, 394.851) of the center of the cylinder of inner cylinder measuring point 2 in coordinate system III. (10) The X and Y coordinate values ​​of C3 (0.035, 0.038, 468.260) and D4 (0.045, -0.015, 394.851) are all within the range of ±0.05mm, and the centers of the inner and outer cylinders are qualified; (11) Turn the cylinder from a vertical position to a horizontal position and support it on the bearing box; (12) Set up laser measuring instruments on the motor side and turbine side of the outer cylinder respectively, and place the laser measuring target ball on the inner holes of the outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, inner cylinder measuring point 2, outer cylinder datum 3, and outer cylinder datum 4 to take points. The number of points taken on each inner hole shall not be less than 12 points. (13) In the measurement software, a central axis is established with the cylindrical center of the outer cylinder datum 1 and the outer cylinder datum 2. A spatial reference coordinate system IV is established with the central axis as the Z4 axis and the cylindrical center of the outer cylinder datum 1 as the coordinate origin. The X axis points to the upper side of the cylinder and the Y axis points to the left side of the cylinder. The coordinate value C5 (-0.035, 0.02, 468.260) of the cylindrical center of the inner cylinder measuring point 1 in the coordinate system IV is read. A central axis is established with the cylindrical center of the outer cylinder datum 3 and the outer cylinder datum 4. A spatial reference coordinate system V is established with the central axis as the Z5 axis and the cylindrical center of the outer cylinder datum 4 as the origin. The X axis points to the upper side of the cylinder and the Y axis points to the right side of the cylinder. The coordinate value D6 (-0.13, 0.015, 394.781) of the cylindrical center of the inner cylinder measuring point 2 in the coordinate system V is read. Compare the X coordinates of C5 and C3, and D6 and D4, and calculate the horizontal subsidence of the inner cylinder measuring point center relative to the outer cylinder center using X5-X3 and X6-X4: the subsidence of inner cylinder measuring point 1 is 0.07mm, and the subsidence of inner cylinder measuring point 2 is 0.175mm. When vertically centering the inner cylinder, the upper and lower centers of the inner cylinder must be pre-compensated for this subsidence. (14) The cylinder is turned over from the horizontal state to the vertical state, and the center of the inner cylinder is adjusted by aligning the thickness of the center key process gasket. The laser measurement target ball is placed on the inner holes of the outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, and inner cylinder measuring point 2 to take points. The number of points taken for each inner hole is not less than 12 points. In the measurement software, the centers of the two cylinders of outer cylinder datum 1 and outer cylinder datum 2 are selected to establish a central axis. The center axis is the Z6 axis, and the center of the outer cylinder datum 1 is used as the coordinate origin to establish a spatial reference coordinate system VI. The X axis of the coordinate system VI points to the upper side of the outer cylinder, and the Y axis points to the left side of the outer cylinder. The center of the cylinder of the inner cylinder measuring point 1 is named C7, and the center of the cylinder of the inner cylinder measuring point 2 is named D8. The centers of the inner cylinders are read separately. The coordinate values ​​in reference coordinate system I are C7 (0.05, 0.04, 468.261) and D8 (0.185, 0.02, 4244.821). At this time, the upper and lower centers of the inner cylinder relative to the outer cylinder have taken into account the sinking of the inner and outer cylinders in the horizontal state. The X coordinate value of the center C7 minus the sinking amount is: 0.05-0.07=-0.02mm, and the X coordinate value of the center D8 minus the sinking amount is: 0.185-0.175=0.01mm. It can be seen that the X coordinate values ​​of the centers C7 and D8 in the horizontal state are both within the range of ±0.05mm, and the Y coordinate values ​​of the centers C7 and D8 are also within the range of ±0.05mm. Therefore, the centers of the inner and outer cylinders are qualified when they are horizontal.

Claims

1. A laser alignment method for the center of a double-cylinder cylinder without a horizontal center plane, characterized by: Including vertical state ultra-high pressure inner and outer cylinder center measurement method and horizontal state ultra-high pressure inner and outer cylinder center measurement method; The vertical state ultra-high pressure inner and outer cylinder center measurement method uses a laser measuring instrument to measure the center of the ultra-high pressure inner and outer cylinders, and uses the center of the outer cylinder front section steam seal body mounting hole as a reference to align the center of the inner cylinder; The method for measuring the centers of the ultra-high pressure inner and outer cylinders in a horizontal state uses a laser measuring instrument to measure the centers of the ultra-high pressure inner and outer cylinders, and uses the centers of the installation holes of the front and rear sections of the steam seal body of the outer cylinder as a reference to align the centers of the inner cylinders respectively.

2. The laser alignment method for the center of a double-cylinder cylinder without a horizontal center plane according to claim 1 is characterized in that: The vertical state ultra-high pressure inner and outer cylinder center measurement method comprises the following steps: (1) Measurement status: The ultra-high pressure inner cylinder red sleeve is vertically installed into the front section of the outer cylinder, and the process adjustment gasket is installed at the center key position of the inner and outer cylinders. The axial positioning dimensions of the inner and outer cylinders are qualified; (2) Measuring point location: the innermost and outermost minimum diameter inner hole circles of the installation holes of the front section steam seal of the outer cylinder, the concentric assembly measuring point of the steam seal end of the inner cylinder, and the concentric assembly measuring point of the exhaust end of the inner cylinder; (3) Measurement requirements: A laser measuring instrument is set up at the bottom of the front section of the ultra-high pressure outer cylinder, and points are measured on the inner holes of each measuring point in the cylindrical measurement mode. The number of points for each inner hole shall not be less than 12; (4) Data processing: In the laser measurement software, a reference coordinate system is established with the centers of the two cylinders on the outer cylinder. The coordinate values ​​of the centers of the cylinders at both ends of the inner cylinder in the reference coordinate system are read out respectively. According to the correspondence between the coordinate axis and the up and down and left and right directions of the cylinder, the cylinder center is judged to be qualified and the position of the inner cylinder is adjusted according to the coordinate values.

3. The laser alignment method for the center of a double-cylinder cylinder without a horizontal center plane according to claim 1 is characterized in that: The method for measuring the centers of the ultra-high pressure inner and outer cylinders in a horizontal state comprises the following steps: (1) Measuring state: The inner and outer cylinders are supported horizontally on the bearing box; (2) Measurement point location: the innermost and outermost minimum diameter inner hole circles of the front and rear sections of the outer cylinder steam seal body installation holes, the concentric assembly measurement point of the inner cylinder steam seal end, and the concentric assembly measurement point of the inner cylinder exhaust end; (3) Measurement requirements: Install laser measuring instruments at both ends of the ultra-high pressure outer cylinder, and measure points on the inner holes of each measuring point in the cylindrical measurement mode. The number of points for each inner hole should be no less than 12; (4) Data processing: In the laser measurement software, the reference coordinate system is established with the center of the cylindrical measuring points on the front and rear sections of the outer cylinder respectively. The coordinate values ​​of the center of the cylindrical measuring points at both ends of the inner cylinder in their respective corresponding reference coordinate systems are read out. According to the correspondence between the coordinate axis and the up and down and left and right directions of the cylinder, the cylinder center is judged to be qualified and the position of the inner cylinder is adjusted according to the coordinate value.

4. The laser alignment method for the center of a double-cylinder cylinder without a horizontal center plane according to claim 1 is characterized in that: The vertical state ultra-high pressure inner and outer cylinder center measurement method further includes: (1) A laser measuring instrument is set up at the middle position of the bottom of the front section of the ultra-high pressure outer cylinder, and the laser measuring target ball is tested by computer measurement software to see if it can receive laser signals at all measuring points of the outer cylinder and the inner cylinder; (2) Place the laser measuring target ball on the inner holes of the outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, and inner cylinder measuring point 2 and take points. The number of points taken on each inner hole shall not be less than 12 points. (3) In the measurement software, select the centers of the two cylinders, outer cylinder datum 1 and outer cylinder datum 2, to establish a central axis. With the central axis as the Z1 axis and the center of the outer cylinder datum 1 as the coordinate origin, establish a spatial reference coordinate system I. The X axis of the coordinate system I points to the upper side of the outer cylinder, and the Y axis points to the left side of the outer cylinder. (4) The center of the cylinder at measuring point 1 of the inner cylinder is named C1, and the center of the cylinder at measuring point 2 of the inner cylinder is named D1. The coordinate values ​​of the centers of the inner cylinders in the reference coordinate system I are read respectively: C1(X1, Y1, Z1) and D1(X2, Y2, Z2); (5) The actual deviation of the inner cylinder relative to the outer cylinder center is determined by the X and Y coordinate values ​​of the circle center C1 and the circle center D1. Then, the center key process is adjusted according to the deviation value to adjust the thickness of the gasket to adjust the center of the inner cylinder until the concentricity tolerance of the inner and outer cylinder centers is 0.05 mm. The coordinate value X represents the center deviation of the inner cylinder relative to the outer cylinder in the vertical direction, and the coordinate value Y represents the center deviation of the inner cylinder relative to the outer cylinder in the left and right direction. (6) Repeat steps (1) to (5), re-measure the center of the inner and outer cylinders until they are qualified, then fasten the rear section of the outer cylinder and tighten the connecting bolts of the outer cylinder center surface; (7) Place the laser measuring target ball on the inner holes of outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, inner cylinder measuring point 2, outer cylinder datum 3, and outer cylinder datum 4 and take points. The number of points taken on each inner hole shall not be less than 12 points. (8) In the measurement software, establish a central axis with the center of the cylinder of outer cylinder datum 1 and outer cylinder datum 2. With the central axis as the Z2 axis and the center of the cylinder of outer cylinder datum 1 as the coordinate origin, establish a spatial reference coordinate system II, with the X axis pointing to the upper side of the cylinder and the Y axis pointing to the left side of the cylinder. Read the coordinate value C3 (X3, Y3, Z3) of the center of the cylinder of inner cylinder measuring point 1 in coordinate system II. (9) Establish the central axis with the center of the cylinder of outer cylinder datum 3 and outer cylinder datum 4. Establish the spatial reference coordinate system III with the central axis as the Z3 axis and the center of the cylinder of outer cylinder datum 4 as the origin. The X axis points to the upper side of the cylinder and the Y axis points to the right side of the cylinder. Read the coordinate value D4 (X4, Y4, Z4) of the center of the cylinder of inner cylinder measuring point 2 in coordinate system III. (10) The X and Y coordinate values ​​of inner cylinder measuring point 1 and inner cylinder measuring point 2 are within the range of ±0.05mm, and the centers of the inner and outer cylinders are qualified.

5. The laser alignment method for the center of a double-cylinder cylinder without a horizontal center plane according to claim 1 is characterized in that: The method for measuring the centers of the inner and outer cylinders of the ultra-high pressure in the horizontal state further comprises: (1) Turn the cylinder from a vertical position to a horizontal position and support it on the bearing box; (2) Set up laser measuring instruments on the motor side and turbine side of the outer cylinder respectively, and place the laser measuring target ball on the inner holes of outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, inner cylinder measuring point 2, outer cylinder datum 3, and outer cylinder datum 4 to take points. The number of points taken on each inner hole shall not be less than 12 points. (3) In the measurement software, establish a central axis with the cylindrical center of outer cylinder datum 1 and outer cylinder datum 2, establish a spatial reference coordinate system IV with the central axis as the Z4 axis and the cylindrical center of outer cylinder datum 1 as the coordinate origin, with the X axis pointing to the upper side of the cylinder and the Y axis pointing to the left side of the cylinder, read the coordinate value C5 (X5, Y5, Z5) of the cylindrical center of inner cylinder measuring point 1 in coordinate system IV, establish a central axis with the cylindrical center of outer cylinder datum 3 and outer cylinder datum 4, with the central axis as the Z5 axis and the cylindrical center of outer cylinder datum 4 as the origin. Establish a spatial reference coordinate system V, with the X-axis pointing to the upper side of the cylinder and the Y-axis pointing to the right side of the cylinder. Read the coordinate value D6 (X6, Y6, Z6) of the center of the cylinder of the inner cylinder measuring point 2 in coordinate system V. Read the center coordinate value C5 (X5, Y5, Z5) of the inner cylinder measuring point 1 in the horizontal state, and the center coordinate value D6 (X6, Y6, Z6) of the inner cylinder measuring point 2. Among them, X3-X5 and X4-X6 represent the subsidence of the center of the inner cylinder measuring point relative to the center of the outer cylinder. When the inner cylinder is vertically centered, the center of the inner cylinder must be compensated for the subsidence in advance. (4) The cylinder is turned from the horizontal state to the vertical state, and the center of the inner cylinder is adjusted by aligning the thickness of the center key process gasket. The laser measurement target ball is placed on the inner holes of the outer cylinder datum 1, outer cylinder datum 2, inner cylinder measuring point 1, and inner cylinder measuring point 2 to take points. The number of points taken for each inner hole is not less than 12 points; in the measurement software, the centers of the two cylinders of outer cylinder datum 1 and outer cylinder datum 2 are selected to establish a central axis. The center axis is used as the Z6 axis, and the center of the outer cylinder datum 1 is used as the coordinate origin to establish a spatial reference coordinate system VI. The X axis of the coordinate system VI points to the outer cylinder. On the upper side, the Y axis points to the left side of the outer cylinder; the cylindrical center of the inner cylinder measuring point 1 is named C7, and the cylindrical center of the inner cylinder measuring point 2 is named D8. The coordinate values ​​of each center of the inner cylinder in the reference coordinate system I are read respectively C7 (X7, Y7, Z7) and D8 (X8, Y8, Z8); the actual deviation of the inner cylinder relative to the outer cylinder center is judged by the X and Y coordinate values ​​of the center C7 and the center D8. At this time, the vertical offset of the inner cylinder relative to the outer cylinder center should be equal to the sinking amount of the inner and outer cylinders in the horizontal state. The centers of the inner and outer cylinders are qualified in the horizontal state.

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