31 results about "Ovality" patented technology

The invention relates to the technical field of industrial nondestructive testing, in particular to a wall thickness detection device and method based on a dual-ray system, and the method comprises the steps: synchronously shooting vertical and horizontal projection images of a pipe through a dual-ray source; extracting first line gray data of the bidirectional projection image, and capturing an edge position through an automatic threshold method; grabbing inflection points of the inner wall and the outer wall of the pipe according to the edge position, and totally obtaining eight inflection points; calculating inner and outer diameters of the pipe by using a mathematical model based on the inflection point position Calculating the wall thickness, the ovality, the eccentricity value and the concentricity according to the inner diameter and the outer diameter; according to the invention, full detection in the pipe production process is realized, the detection efficiency is high, the influence of slight shaking of the pipe can be resisted, the detection result is accurate, and the device is suitable for detecting the wall thickness and related quality indexes of linear materials such as PVC pipes and cables.

The invention belongs to the technical field of scanning measurement, particularly relates to a cable outer diameter and ovality measurement method and system based on line laser contour scanning, and aims to solve the technical problem of low measurement precision caused by the fact that an existing algorithm is sensitive to noise, asymmetry of light strips and contour discrete points. The measurement method comprises the following steps: S1, performing anisotropic Gaussian filtering on a pixel according to a local tangential direction of a preliminary center line; s2, calculating a second derivative value and a third derivative value of the sub-pixel center point in the normal direction; s3, performing initial weighted least square ellipse fitting by using the corrected contour point set and the corresponding fitting weight to obtain parameters of an initial ellipse; and S4, based on the lengths of the long axis and the short axis of the fitting ellipse, calculating to obtain the outer diameter and the ellipticity of the cable. According to the measurement method, the interference of abnormal data points introduced by local flaws such as oil stains and scratches on the surface of the cable is eliminated, and the accuracy and the stability of a fitting result are improved.

The invention relates to the field of cable twisting assemblies, and provides a twisting assembly with tension dynamic compensation in order to solve the problem that the existing twisting assembly is difficult to effectively solve the problem that the stability of cable performance is reduced due to single-wire errors, and the twisting assembly comprises a twisting disc, a twisting collection piece, an ovality detection mechanism and a tension adjusting mechanism, the twisting disc is provided with a center hole and peripheral holes surrounding the center hole. The twisting collection member is provided with a through hole. The ovality detection mechanism is arranged on one side, far away from the twisting disc, of the twisting collection piece; the tension adjusting mechanism is used for adjusting the tension of the stranded wire. According to the invention, through the movable ovality detection mechanism, the ovality of the cable is detected in real time, and the tension of the stranded wire is dynamically compensated through the real-time detection result, so that the stability of the product performance, especially the resistance stability, is ensured; the dynamic detection of the ovality detection mechanism not only can obtain the ovality of the cable and deviated stranded wires, but also can reduce the influence of temperature change on the final ovality of the cable, and improves the accuracy of the detection result and the dynamic compensation process.

The invention discloses a plastic pipe extrusion on-line ovality detection and correction method and device, and belongs to the technical field of plastic pipe forming. Comprising the following steps: S1, pipe surface data measurement: driving a turntable to rotate around a pipe, and synchronously measuring distance and temperature through a displacement sensor and a temperature sensor on the turntable; s2, ellipticity calculation: calculating the real-time ellipticity and the distribution orientation of the pipe based on the distance data; s3, temperature partition calculation: calculating the average temperature and the temperature difference of each fan-shaped partition of the pipe based on the temperature data; and S4, ellipticity closed-loop regulation and control: associating the distribution orientation of the ellipticity with the temperature parameters of the corresponding subareas, and differentially adjusting the cooling parameters of the corresponding subareas on the setting machine so as to actively correct the ellipticity. According to the method, the ellipticity and the circumferential temperature are measured synchronously on line, and partition regulation and control are implemented based on'temperature-deformation 'association, so that closed-loop quality control from passive detection to active prevention is realized.

The invention relates to the technical field of metal ring piece plastic forming, and discloses a single-side radial limitation shape correcting method for a ring piece with an elliptical inner diameter and an elliptical outer diameter. Aiming at the problem that the size is out of control due to a single-side free state in the existing bulging / reducing process, the method adopts an alternate constraint strategy: locking the outer diameter through reducing or locking the inner diameter through bulging according to the ovality difference of the inner diameter and the outer diameter; the method specifically comprises the steps that the ring piece is placed between expansion and shrinkage dies, the hole shrinkage process and the bulging process are executed in batches, and after deformation each time, die loading on one side is kept to restrain deformation of the free side; wherein the reducing displacement delta is 0.05%-0.5% of the outer diameter of the ring piece, and the rotation angle alpha is 10-60 degrees. Through a discrete fan-shaped mold and a dynamic constraint mechanism, the problems of ovality intensification, mold pasting failure and stress concentration in a traditional process are solved, the roundness of the ring piece meets the requirement, and the yield of the large thin-wall ring piece is greatly improved.

A method for controlling ovality during production of a round billet by using a continuous casting machine. The method comprises the following steps: step 1, determining the total reduction amount of a round billet on the basis of a total reduction amount calculation formula, wherein the total reduction amount calculation formula is: H=D×3.0%; and step 2, distributing the total reduction amount to appropriate withdrawal and straightening machines for reduction implementation, and determining the withdrawal and straightening machines for implementing a reduction operation from among a plurality of withdrawal and straightening machines (1), and reduction amounts thereof. Reduction amount control and a displacement control mode ensure that the ovality of round billets is controlled within 3.0%, so as to meet the standard requirement of less than 3.5%, so that all the round billets can meet the ovality requirement during production.

A paperboard winding tube (10) of enhanced compression stiffness and resistance to deformations leading to ovality under gravity type loading is disclosed. The paperboard winding tube (10) may include a cylindrical body wall (12) formed from a plurality of structural paperboard layers (30-40) with at least one central structural paperboard layer (34, 36) disposed between at least one radially inward structural paperboard layer (38, 40) and at least one radially outward structural paperboard layer (30, 32). The radially inward and the radially outward structural paperboard layers (30, 32, 38, 40) may be formed of a paperboard ply of a first stiffness, and the central structural paperboard layer (34, 36) may be formed of a paperboard ply of a second stiffness that is less than the first stiffness. The arrangement of the plurality of structural paperboard layers (30-40) increases the compression stiffness of the paperboard winding tube (10) to resist deformations leading to ovality of the cylindrical body wall (12) under gravity ty pe loading of the paperboard winding tube (10).

The utility model belongs to the technical field of detection, and particularly relates to a device for detecting the inner diameter ovality of a large-diameter ring piece, which is used for accurately finding the position of a central shaft of the ring piece by accurately moving a stand column in the longitudinal direction and the transverse direction, so that the ring piece can be generally positioned when being hoisted and placed, and the hoisting operation is convenient. The crawling supporting part slides up and down on the stand column body, the diameters of different height positions can be measured, and the device is suitable for measuring the ellipticity of the inner diameter of a large-height ring piece. In addition, the wireless communication module is connected with a remote controller, remote operation can be carried out, personnel do not need to approach, the device can be used for measuring normal-temperature ring pieces and thermal-state ring pieces, and the manual measurement environment is improved. The device is simple in structure, convenient to operate, low in cost and high in applicability, and makes a great contribution to production cost control.

The utility model relates to the technical field of circular part ovality detection, and one embodiment of the utility model provides a circular part ovality detection device which comprises a positioning block arranged on a main body, the positioning block is provided with a clamping groove, and the clamping groove is used for abutting against the side wall of a circular part; the sliding block is arranged on the main body in a sliding manner and is close to or far away from the clamping groove after sliding; the dial gauge is arranged on the sliding block and provided with a measuring head, and the measuring head faces the circular part. According to the technical scheme, the technical problem that the position adjusting distance of the dial gauge is limited in the prior art is solved.

The utility model provides a non-contact type inner diameter measuring instrument. The non-contact type inner diameter measuring instrument comprises a placement mechanism arranged on a supporting table top and a detection mechanism capable of extending to the placement mechanism. The placing mechanism comprises a placing disc capable of driving a to-be-detected steel ring to rotate, the to-be-detected steel ring and the placing disc are concentrically placed, and the detection mechanism moves in the radial direction according to the diameter of the to-be-detected steel ring with the circle center of the placing disc as the datum point and is used for scanning the upper end face and the lower end face of the to-be-detected steel ring on the placing disc. The utility model has the beneficial effects that on the basis of ensuring that the steel wire ring does not deform, the inner wall and the outer wall of the steel wire ring can be scanned and measured, the data of the inner perimeter, the outer perimeter, the thickness and the ovality of the steel wire ring can be obtained at the same time, the instrument is convenient to operate, and the detection efficiency is improved.

The invention relates to the field of perpendicularity detection devices, in particular to a construction hole perpendicularity detection method and a construction hole perpendicularity detection device.According to the construction hole perpendicularity detection method, periodic length changes are applied to a vertical line, so that a suspended spherical hammer body generates limited displacement response in a hole; according to the method, effective data with a high signal-to-noise ratio can still be obtained under the condition of an extremely small annular gap, accurate detection of the deflection direction and the inclination angle of the axis of the construction hole is achieved, the detection process is simplified, the detection efficiency and reliability are improved, and the method is suitable for popularization and application. According to the construction hole perpendicularity detection method, the problem that the detection result is unstable and inaccurate due to the fact that single static vertical line reading is depended on and is easily influenced by hole wall ovality, water flow disturbance, wire friction and environmental noise in the prior art is solved.

The invention discloses a large offshore wind power barrel structure pocket-pulling hoisting process optimization method which comprises the following steps: S1, aiming at a wind power barrel hoisting process, establishing a mechanical model considering material characteristics and steel wire rope characteristics; s2, calculating a theoretical pocket-pulling wrap angle to obtain in-plane axial force, shearing force and bending moment distribution of the cylinder in the pocket-pulling hoisting process, and predicting a risk position in the hoisting process through an actual wrap angle; s3, calculating the radial displacement of the barrel at each angle, and calculating the absolute ovality and the relative ovality of the wind power barrel according to the solved radial displacement; s4, based on the wind power cylinder hoisting longitudinal simplified mechanical model, calculating a theoretical pocket pulling hoisting position, and forming a calculation algorithm for accurately pre-judging a reasonable hoisting position; and S5, calculating a theoretical pocket-pulling hoisting inclination angle, and determining the maximum inclination angle under pocket-pulling hoisting. According to the invention, by optimizing the pocket-pulling hoisting scheme and reasonably arranging the hoisting position, the hoisting wrap angle and the hoisting dip angle, the risks of slipping, overturning and the like possibly occurring in the hoisting process are effectively reduced.

The application discloses a forming die for eliminating the ovality of a special-shaped ring piece, which is used for bulging and extruding forming of the special-shaped ring and comprises two symmetrically arranged bulging tools and a fastening tool. The two bulging tools are correspondingly spliced to form a die body, and the fastening tool is sleeved on the die body to fix the two bulging tools. The two bulging tools are spliced to form a special-shaped groove on the inner wall of the die body for bulging forming of the special-shaped ring and a mounting hole on the position of the central axis of the die body for fixing the die body on a bulging machine. Since the profile of the special-shaped groove is a design profile, the ring blank is locked by the forming die during bulging and extruding processing, the profile of the ring blank is guaranteed to be the profile of the special-shaped groove, and thus the ring blank is processed to have the design profile and size, so that the ovality of the part is eliminated, and the purpose of guaranteeing the dimensional stability of the special-shaped ring piece during the bulging and extruding process is achieved.

The application provides a progressive correction and reinforcement method and device for a submarine pipeline pipe, and the specific steps are as follows: determining the diameter reduction rate of the pipeline pipe to be corrected and the radius of the diameter reduction die; four diameter reduction dies compress the pipeline pipe to be corrected under the action of a universal press, the correction in the L' length range is completed, and the correction of the full length size of the pipeline pipe to be corrected is progressively completed; the straightness and the ovality of the pipeline pipe after correction are measured; the change of the residual stress is analyzed through a cutting experiment; and the change of the hoop compressive yield strength is analyzed through a compression experiment. The application corrects the straightness and the ovality of the pipeline pipe, improves the hoop compressive yield strength of the pipeline pipe, reduces the hoop residual stress, improves the pressure collapse resistance and the service depth, the pipeline pipe after correction is subjected to low-temperature heat treatment, the hoop compressive yield strength and the pressure collapse resistance are further improved without affecting the geometric shape, and the application is particularly suitable for the correction and pressure collapse resistance performance reinforcement of the oil and gas pipeline pipe in a deep sea environment.

The invention provides large-diameter steel pipe sizing equipment for inhibiting ovality, and relates to the technical field of metal pipe machining and forming. Comprising an adjusting mechanism, a sizing mechanism, a sensing module and a main control unit, according to the equipment, active centering of the machining spindle and the actual centroid of a pipe opening is achieved through the three-axis adjusting base; the main control unit is used for controlling a sizing roller extending into a pipe to perform reciprocating spinning rounding in a large sector avoiding a longitudinal weld joint based on contour and weld joint data acquired by the sensing module, and performing micro-differential variable-radian sweeping in a short-axis area through electro-hydraulic servo driving, so that a reverse ellipse for counteracting unloading springback is accurately pressed out; meanwhile, the external shock excitation mechanism and the internal sizing roller form a follow-up clamp, and ultrasonic waves are synchronously transmitted to excite the acoustic plastic effect; according to the method, polygon defects and weld joint damage are eliminated, deformation compensation and residual stress elimination are achieved, and the port stability of the large-diameter steel pipe is improved.

The present application belongs to the technical field of scanning measurement, and particularly relates to a cable outer diameter and ovality measurement method and system based on line laser profile scanning, to solve the technical problem of low measurement accuracy caused by sensitivity of existing algorithms to noise, light strip asymmetry and profile discrete points. The measurement method comprises the following steps: S1, performing anisotropic Gaussian filtering on pixels according to the local tangent direction of the preliminary center line; S2, calculating the second derivative value and the third derivative value of the sub-pixel center point in the normal direction; S3, using the corrected profile point set and the corresponding fitting weight, performing initial weighted least squares ellipse fitting to obtain the parameters of the initial ellipse; S4, based on the length of the major axis and the minor axis of the fitted ellipse, calculating the outer diameter and the ovality of the cable. The measurement method eliminates the interference of abnormal data points introduced by cable surface oil stains, scratches and local defects, and improves the accuracy and stability of the fitting result.

The invention relates to a high-precision cutting device for a large-diameter high-strength steel cylinder structure, and belongs to the field of numerical control profiling machining of large cylinder structures. The device comprises a driving unit, a tool bit, a measurement profiling unit and a numerical control unit, the driving unit is used for driving the tool bit to perform six-degree-of-freedom motion so as to cut a workpiece; the measurement profiling unit is used for measuring the surface of the workpiece to obtain the actual shape of the surface of the workpiece; the numerical control unit is used for generating a tool bit machining path according to the obtained actual morphology of the workpiece surface. According to the invention, six-degree-of-freedom multi-axis movement of the tool bit can be realized. The numerical control unit generates a self-adaptive machining path through a trajectory planning and compensation algorithm, dynamic trajectory correction is achieved through the multi-axis linkage control module, the method can adapt to the situation of workpiece field deformation, adjustment flexibility is good, field machining efficiency and adaptability are remarkably improved, and machining precision is improved. And meanwhile, the problem of insufficient cutting precision caused by ovality and local deformation of a large-diameter cylinder is solved.

The application relates to the field of perpendicularity detection devices, in particular to a construction hole perpendicularity detection method and a construction hole perpendicularity detection device. The construction hole perpendicularity detection method is characterized in that a periodic length change is applied to a plumb line, a suspended spherical hammer body generates a limited displacement response in the hole, and the deflection direction and the inclination angle of the shaft are calculated by using a coordinate sequence and a reference signal. The method can still obtain effective data with high signal-to-noise ratio under the condition of a small annular gap, accurately detects the deflection direction and the inclination angle of the shaft line of the construction hole, simplifies the detection process, improves the detection efficiency and reliability, and solves the problem that the detection result is unstable and inaccurate due to the influence of the hole wall ovality, water flow disturbance, wire friction and environmental noise in the prior art which depends on a single static plumb line reading.

The application discloses a four-roll centering roller-based opening degree adjusting method, solves the problems that the rolled steel pipe is easy to fall along the vertical direction and the wall thickness and the ovality of the rolled steel pipe are out of tolerance, arranges one centering roller above, below, left and right of the rolling center line to form a four-roll centering arrangement mode, sets four centering pins on the frame around the rolling center, hingedly connects one special-shaped swing arm on each centering pin, connects the four special-shaped swing arms together through connecting rods to form three parallelogram four-link mechanisms which can be connected simultaneously, and makes the four centering rollers always arranged on a circle through the three parallelogram four-link mechanisms which can swing simultaneously, so that the synchronous adjustment of the opening degree is realized, and the four centering rollers are always arranged on the same circle.

A method for determining rock mechanical properties is disclosed. The method includes obtaining, at a selected depth location of a borehole, initial radial geometry measurements of the borehole and initial borehole fluid pressure measurements of a borehole fluid, perturbing a pressure of the borehole fluid, obtaining, in response to perturbing the pressure of the borehole fluid and at the selected depth location, dynamic radial geometry measurements of the borehole, analyzing a difference of the initial radial geometry measurements and the dynamic radial geometry measurements to determine differences in radial and axial components of strain tensor at a surface of the borehole at the selected depth location, determining the rock mechanical properties at the selected depth location by analyzing the differences in the radial and axial components of the strain tensor, and facilitating, based at least on the determined rock mechanical properties, a drilling operation of the subterranean formation.

The application provides a composite pipe extrusion process synergistic control method, device, equipment and medium, which comprises the following steps: establishing a benchmark process parameter library and a pipe size prediction model; collecting process parameters; adjusting heating and cooling power according to extrusion temperature and melt pressure to stabilize the extrusion working condition; inputting traction speed, vacuum degree and cooling water temperature into the prediction model to obtain a predicted size, calculating a compensation amount of the traction speed and the vacuum degree after weighted fusion of the predicted size and the actually measured size, and updating the set value; performing adaptive adjustment of the vacuum degree and the traction speed, and performing segmented cooling synergistic control combined with the actually measured size to correct the ovality and internal stress; performing traction cutting synchronous control according to the cumulative pipe length and the outer diameter deviation, determining a cutting compensation position, and performing cutting. The application realizes synergistic control of multiple process parameters, and significantly improves the size precision, production stability and yield of the composite pipe.

The invention provides a method for measuring the ovality of a large ring piece. The method comprises the following steps of: calculating a stepping arc length and a quarter of the perimeter of an ellipse; moving the measuring point along a selected direction by a stepping arc length, measuring the diameter, and continuously measuring until the accumulated moving arc length reaches or exceeds a quarter of the perimeter of the ellipse; determining extreme value types contained in the scanning interval, and selecting a point with the maximum diameter or a point with the minimum diameter in the scanning interval as a candidate extreme value point; taking the candidate extreme point as a center to move towards two sides by a half step arc length, measuring the diameters of the three points, and obtaining a first main axis point and the diameter through comparison; positioning a second principal axis point starting from the first principal axis point and moving along the ring by a quarter of the ellipse perimeter, and measuring the diameter; and calculating the difference between the diameters of the first main shaft point and the second main shaft point to obtain the ovality of the ring piece. According to the measurement method, on the premise of ensuring the measurement precision, the equipment cost is reduced, the field adaptability and the operation convenience are improved, and a rapid, accurate and low-cost measurement scheme is provided for the large ring piece with the diameter of 10 meters.

A pipe reference line surveying method, before marking, the pipe needs to be ensured without ovality deviation, the long bubble is completely centered, then the magnets on the 135 degree and 225 degree positions of the measuring ring are adjusted, the magnets are close to the pipe wall, the magnets on the 135 degree and 225 degree positions of the ring plate are adsorbed to the pipe wall, forming fixed points, using a stone pen, the reference line points A, B, C, D corresponding to the 0 degree, 90 degree, 180 degree, 270 degree positions are drawn on the outer surface of the steel pipe to be measured in turn, using the same method, the reference line points A'B'C'D' corresponding to the 0 degree, 90 degree, 180 degree, 270 degree positions are drawn on the other end of the steel pipe to be measured, then using a powder line, the reference line points A-A', B-B', C-C', D-D' are used as reference points to draw a line, the through length reference lines AA', B-B', C-C', D-D' are drawn on the pipe wall, and the printing is made, and provided to the segmented part assembly personnel for positioning construction. The application improves the marking precision, improves the marking efficiency, reduces the number of marking personnel, ensures the segmented construction precision, and reduces the shipbuilding cost.

The application discloses a process optimization method for hoisting a large offshore wind power cylinder structure by a sling, and comprises the following steps: S1, for the hoisting process of the wind power cylinder, a mechanical model considering material properties and steel wire rope properties is established; S2, a theoretical sling wrap angle is calculated, the in-plane axial force, shear force and bending moment distribution of the cylinder in the sling hoisting process are obtained, and a risk position in the hoisting process is predicted through an actual wrap angle; S3, the radial displacement of each angle of the cylinder is calculated, and the absolute ovality and the relative ovality of the wind power cylinder are calculated according to the obtained radial displacement; S4, based on a longitudinal simplified mechanical model of the wind power cylinder hoisting, a theoretical sling hoisting position is calculated, and a calculation algorithm for accurately predicting a reasonable hoisting position is formed; and S5, a theoretical sling hoisting inclination angle is calculated, and the maximum inclination angle under the sling hoisting is determined. Through optimization of the sling hoisting scheme, the hoisting position, the hoisting wrap angle and the hoisting inclination angle are reasonably arranged, and the risks such as sliding and overturning possibly occurring in the hoisting process are effectively reduced.

The application discloses a kind of bar size super group precision rolling method, it is related to rolling technical field.The bar size super group precision rolling method includes the following specific steps, S1 prepares before rolling, S2 checks electrical system, S3 is checked to the hydraulic system of rolling mill, S4 raw material preparation, S5 is carried out surface cleaning to billet, S6 is heated to billet, S7 rough rolling stage, S8 medium rolling stage, S9 finish rolling stage, S10 cooling treatment, S11 straightening treatment, S12 detection and adjustment, the scheme can significantly improve the precision of bar size, by accurately controlling the rolling parameter and process of four-roll round rolling mill, the size precision of bar can be improved to super group precision level, meet the high-precision requirement of high-end application field to bar, effectively control bar ovality, adopt reasonable rolling process and roll adjusting method, the ovality of bar can be controlled within 0.1, make the cross-sectional shape of bar more regular, improve the consistency and stability of product.

The utility model discloses a kind of automatic feeding devices for metal pipe processing, and the roundness correction mechanism includes support seat two, the middle part upper end of support seat two is hollow, and the surface of support seat two and located hollow place outside side is rotationally connected with swivel ring, the front of swivel ring is rotationally connected with several movable frames, each movable frame is equidistantly arranged around swivel ring surface, and the inner wall of each movable frame is also slidably connected with movable rod, one end of movable rod located swivel ring outside side is rotationally connected with support seat two, and the other end inner wall of movable rod is rotationally connected with roundness correction wheel, the outer wall of movable rod is also fixedly installed with motor, the output shaft of motor passes through movable rod and is fixedly connected with roundness correction wheel rotation axis, and the pipeline to be processed can pass through the support seat two in roundness correction mechanism, and the outer wall of pipeline is extruded roundness correction by the roundness correction wheel of support seat two periphery, and then the ovality of metal pipeline is effectively adjusted, in addition, the spacing between roundness correction wheel can be adjusted in size, and then it is suitable for the roundness correction of different diameter metal pipeline.

The invention discloses a processing technology of a port of a caliber pipe fitting for exhaust of a thermal management system. The processing technology comprises the following steps: step 1, laser blanking; step 2, forming a bent pipe; 3, end opening saw cutting is carried out; step 4, bulging and rounding; 5, pipe end forming; the step 4 of bulging and rounding specifically comprises the following steps: tool connection; loading a workpiece; performing bulging action; and maintaining pressure and shaping. According to the processing technology for the port of the caliber pipe fitting, the ovality of the port of the bent pipe can be reduced to be less than 1.01 from 1.05 through radial uniform pressure application of the specially-made bulging tool, the size precision of the outer diameter is improved to phi 127 + / -0.3 mm, and the percent of pass is greater than or equal to 95%; elastic contact (non-rigid extrusion) is adopted in the bulging process, an aluminized layer is prevented from being scratched or falling off, and the corrosion resistance retention rate is larger than or equal to 98%; according to the machining process, tools are transformed based on existing pipe end forming equipment, large equipment does not need to be newly added, the single-piece machining time is shorter than or equal to 5 min, and compared with a traditional process, the efficiency is improved by 30%.

The invention is suitable for the technical field of polarization-maintaining optical fiber devices, and provides an adaptation method and system for a double-fiber collimator and a birefringent crystal group, and the adaptation method comprises the steps: judging whether the double-fiber collimator and the birefringent crystal group are adaptive or not according to the ovality of an image generated after two beams of polarized light penetrating through the birefringent crystal group are overlapped, the two beams of polarized light come from the double-fiber collimator; the central axis of the double-fiber collimator and the central axis of the birefringent crystal group are on the same straight line; and controlling the birefringent crystal group to rotate around the central axis of the birefringent crystal group to a position where the double-fiber collimator and the birefringent crystal group can be judged to be adaptive under the condition that the double-fiber collimator and the birefringent crystal group are judged to be not adaptive and have the adaptive position.

The invention provides a method for designing a blade profile of a turbine support plate with continuous curvature. The method comprises the following steps of: S1, calculating the size and the position of a leading edge ellipse; s2, calculating a tangent point of a chord line and a leading edge ellipse; calculating a tangent point of the leading edge ellipse and the frontal line; calculating tangent point coordinates of the pressure side molded line and the suction side molded line with the front edge; s3, calculating a trailing edge circle center coordinate; s4, calculating tangent point coordinates of the pressure side molded line and the suction side molded line with the trailing edge; s5, acquiring a pressure side molded line and a suction side molded line according to the curvature constraint and the control point coordinates; s6, obtaining a blade profile; geometric parameters input by the design method comprise a leading edge diameter, a leading edge ovality, a trailing edge diameter, a mounting angle, an inlet structure angle, a geometric outlet angle, a leading edge pressure side wedge angle, a leading edge suction side wedge angle, a trailing edge wedge angle and an axial chord length. The curvature of the connecting position of the front edges of the supporting plate blades can be continuous, and the aerodynamic performance is improved.

The application provides a manufacturing method and device of a cylinder, and relates to the technical field of steam turbine equipment. The method comprises the following steps: S1, constructing a simulation model of the cylinder according to structure data of the cylinder; S2, performing thermodynamic simulation on the operation process of the cylinder according to the simulation model, and determining the ovality deformation of the cylinder under the thermal-elastic coupling effect according to the simulation result; S3, in the case that the ovality deformation is not within a preset threshold range, adjusting the structure data of the cylinder, repeatedly performing the above steps S1-S2 by using the adjusted structure data, and stopping until the ovality deformation corresponding to the adjusted structure data is within the threshold range; and S4, manufacturing the cylinder by using the ovality deformation corresponding to the adjusted structure data.