Coaxiality on-line detection and adjustment method for long-span high-rotating-speed power generation system

Abstract

The invention relates to the technical field of engine rotor system assembly, and discloses a coaxiality online detection and adjustment method for a long-span high-rotating-speed power generation system. The method comprises the steps that a first bearing seat and a second bearing seat in the Brayton cycle engine system are installed in a motor casing, and the coaxiality of the two bearing seats is measured; installing a reference assembling and replacing tool of the on-line assembling and adjusting equipment to a first bearing seat in the motor casing; the reference conversion tool and the motor case are installed on an aligning and frequency adjusting table together; each sensor is used for performing corresponding measurement; evaluating a second coaxiality and a second eccentric angle of a second bearing seat relative to the first bearing seat in the motor casing; assembling and connecting the cartridge receiver and the third bearing seat, and arranging a positioning pin; assembling a connecting casing and a motor casing; each sensor is used for performing corresponding measurement; an exhaust casing and a fourth bearing seat are assembled, and sensors are used for corresponding measurement; and the assembled cartridge receiver and the bearing seat are taken down, a positioning pin is arranged, and disassembling operation is executed.

Description

Technical Field

[0001] This invention relates to the field of engine rotor system assembly technology, and in particular to a method for online detection and adjustment of coaxiality of a long-span, high-speed power generation system. Background Technology

[0002] The closed-loop Brayton cycle power generation system is a special turbine power generation technology in which the working medium repeatedly participates in the cycle to generate electricity. It only exchanges energy with the outside world and does not exchange matter. Therefore, it can be applied in special environments without air, such as deep space and deep sea, and has a very broad application prospect.

[0003] The core of a closed Brayton cycle engine system is a high-speed rotor system consisting of an engine and a generator. The engine and generator are coaxially arranged and connected by a flexible coupling, supported by four bearings. Operating at speeds above 60,000 rpm, the length-to-shaft-diameter ratio of the rotor system is greater than 15:1, classifying it as a high-speed, flexible rotor system. The coaxiality of the bearing housings is a critical factor affecting the stable operation of the Brayton cycle power generation system. Excessive coaxiality can lead to excessive vibration or rotor-to-static rubbing failures in the rotor components, directly impacting the reliability and safety of the entire power generation system. The coaxiality of the bearing housings is affected by the machining accuracy of individual parts and the tolerance transfer between multiple parts. Due to limited machining accuracy and large cumulative tolerances, assembly quality cannot be guaranteed solely by the machining accuracy of the individual parts. In terms of measurement methods, due to the long axial distance between the four bearing housings and the small inner diameter of the bearing housings, traditional coordinate measuring machines or coaxiality meters cannot measure the coaxiality between bearing housing #4 and bearing housing #1. They can only evaluate the coaxiality of the assembly between two or three bearing housings, which does not meet the measurement requirements of the Brayton cycle power generation system for high-precision assembly. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an online detection and adjustment method for the coaxiality of a long-span, high-speed power generation system, which can solve the problems in the prior art.

[0005] The technical solution of this invention: A method for online detection and adjustment of coaxiality in a long-span, high-speed power generation system, wherein the method includes:

[0006] Step 1: Install the first and second bearing housings of the Brayton cycle engine system into the motor housing. Use a coaxiality detection device to measure the coaxiality of the two bearing housings and record the first coaxiality value Φ0 and the first eccentricity angle θ0.

[0007] Step 2: Install the reference replacement fixture of the online assembly and adjustment equipment onto the first bearing seat in the motor housing. The online assembly and adjustment equipment also includes a base, a rotating shaft, a self-aligning frequency tuner, a triangular chuck, a left column, a right column, a lower left mounting seat, an upper left mounting seat, a lower right mounting seat, an upper right mounting seat, a first sensor, a second sensor, a third sensor, a fourth sensor, and a coaxiality assessment module. The self-aligning frequency tuner is set at the center of the base via the rotating shaft. The chuck is set on the self-aligning frequency tuner. The left and right columns are respectively set on the left and right sides of the base. The upper left and lower left mounting seats are movably set on the left column, and the upper right and lower right mounting seats are movably set on the right column. The first sensor is set on the lower left mounting seat, the third sensor is set on the lower right mounting seat, the second sensor is set on the upper left mounting seat, and the fourth sensor is set on the upper right mounting seat.

[0008] Step 3: Install the reference conversion fixture and the motor housing together onto the self-aligning frequency converter, and use the triangular chuck to fix the reference conversion fixture.

[0009] Step 4: Use the first sensor to measure the upper end face of the reference conversion fixture, use the third sensor to measure the lower end face of the reference conversion fixture, use the second sensor to measure the inner circle of the second bearing seat in the motor housing, and use the fourth sensor to measure the upper end face of the motor housing.

[0010] Step 5: Use the coaxiality evaluation module to evaluate the second coaxiality Φ1 and the second eccentricity angle θ1 of the second bearing housing in the motor housing relative to the first bearing housing. Compare the second coaxiality Φ1 and the second eccentricity angle θ1 with the first coaxiality Φ0 and the first eccentricity angle θ0 respectively, and determine whether the first requirement is met based on the comparison results. If the first requirement is not met, adjust the tilt angle and eccentricity of the self-aligning frequency tuner until the requirement is met.

[0011] Step 6: Assemble the connecting casing and the third bearing housing in the Brayton cycle engine system according to their relative positions. Set multiple locating pins in a circumferentially evenly distributed manner at the connecting flange of the connecting casing and the third bearing housing, install the matching fasteners, and tighten the fasteners to the specified torque.

[0012] Step 7: Keep the motor housing and the online assembly and adjustment equipment in the same position, and place the connecting housing equipped with the third bearing seat on the motor housing. At this time, the connecting housing and the motor housing are not equipped with fasteners.

[0013] Step 8: Measure the inner cylindrical surface of the third bearing housing using the second sensor, measure the upper end face of the third bearing housing using the fourth sensor, and evaluate the third coaxiality Φ2 and third eccentricity angle θ2 of the third bearing housing relative to the first bearing housing using the coaxiality evaluation module. Calculate the fourth coaxiality Φ between the third and second bearing housings based on the vector addition principle. 1-2And determine the third coaxiality Φ2 and the fourth coaxiality Φ 1-2 Check if the second requirement is met. If not, adjust the relative position between the connecting housing and the motor housing until the second requirement is met. Tighten the fasteners between the connecting housing and the motor housing. After installation, record the third coaxiality Φ2 and the fourth coaxiality Φ. 1-2 With the third eccentricity angle θ2;

[0014] Step 9: Assemble the compressor exhaust casing on the third bearing housing, install and tighten the fasteners between the compressor exhaust casing and the third bearing housing;

[0015] Step 10: Place the fourth bearing housing in the Brayton cycle engine system onto the compressor exhaust casing according to their relative positions. At this time, the fasteners between the fourth bearing housing and the compressor exhaust casing are not installed. Use the second sensor to measure the inner cylindrical surface of the fourth bearing housing, and use the fourth sensor to measure the upper end face of the fourth bearing housing. Use the coaxiality assessment module to assess the fifth coaxiality Φ3 and the fourth eccentricity angle θ3 of the fourth bearing housing relative to the first bearing housing. Calculate the sixth coaxiality Φ between the third and second bearing housings according to the vector addition principle. 1-3 Calculate the seventh coaxiality Φ between the fourth bearing housing and the second bearing housing. 2-3 And determine the fifth coaxiality Φ3 and the sixth coaxiality Φ 1-3 Coaxiality Φ of the seventh 2-3 Check if the third requirement is met. If not, adjust the relative position between the fourth bearing housing and the compressor exhaust casing until the third requirement is met. Tighten the fasteners between the fourth bearing housing and the compressor exhaust casing. After installation, record the fifth coaxiality Φ3 and the sixth coaxiality Φ. 1-3 7th coaxiality Φ 2-3 With the fourth eccentricity angle θ3;

[0016] Step 11: Remove the assembled motor housing, connecting housing, third bearing housing, compressor exhaust housing, and fourth bearing housing (including the first and second bearing housings) from the online assembly equipment in their installed state. Set multiple locating pins evenly distributed circumferentially at the connecting flange between the fourth bearing housing and the compressor exhaust housing, and set multiple locating pins evenly distributed circumferentially at the connecting flange between the compressor exhaust housing and the third bearing housing. Then disassemble the motor housing and connecting housing, the connecting housing and the third bearing housing, the third bearing housing and the compressor exhaust housing, and the compressor exhaust housing and the fourth bearing housing.

[0017] Step 12: During the assembly of the Brayton cycle power generation system, the casings and the corresponding bearings are assembled according to the positional relationship constrained by the locating pins.

[0018] Preferably, determining whether the first requirement is met based on the comparison results includes:

[0019] If |Φ1-Φ0|≥0.001mm or |θ1-θ0|≥1°, then the first requirement is not met;

[0020] If |Φ1-Φ0|<0.001mm and |θ1-θ0|<1°, then the first requirement is met.

[0021] Preferably, the third coaxiality Φ2 and the fourth coaxiality Φ are determined. 1-2 Whether the second requirement is met includes:

[0022] If Φ2>0.02mm or Φ 1-2 If the value is greater than 0.02mm, then the second requirement is not met;

[0023] If Φ2≤0.02mm and Φ 1-2 If the value is ≤0.02mm, then the second requirement is met.

[0024] Preferably, the fifth coaxiality Φ3 and the sixth coaxiality Φ are determined. 1-3 Coaxiality Φ of the seventh 2-3 Whether the third requirement is met includes:

[0025] If Φ3>0.02mm or Φ 1-3 >0.02mm or Φ 2-3 If the value is greater than 0.02mm, then the third requirement is not met;

[0026] If Φ3≤0.02mm and Φ 1-3 ≤0.02mm and Φ 2-3 If the value is ≤0.02mm, then the third requirement is met.

[0027] Preferably, the coaxiality testing device is a coordinate measuring machine or a coaxiality meter.

[0028] Preferably, the number of locating pins evenly distributed circumferentially at the connecting flange between the connecting casing and the third bearing housing is 4, the number of locating pins evenly distributed circumferentially at the connecting flange between the fourth bearing housing and the compressor exhaust casing is 4, and the number of locating pins evenly distributed circumferentially at the connecting flange between the compressor exhaust casing and the third bearing housing is 4.

[0029] The above technical solution can be used to evaluate the coaxiality of the four bearing seats and make adjustments based on the evaluation results to ensure the assembly quality of each component, thereby meeting the high-precision assembly requirements of the closed Brayton cycle power generation system for the coaxiality of the pivot points. Attached Figure Description

[0030] The accompanying drawings, which form part of this specification, are provided to further illustrate embodiments of the invention and, together with the textual description, explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0031] Figure 1 This is a schematic diagram of an online testing and adjustment device provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the alignment of bearing housing #1 and bearing housing #2 in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the measurement of bearing housing #3 in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the measurement of bearing housing #4 in an embodiment of the present invention. Detailed Implementation

[0035] Specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, specific details are set forth for purposes of explanation and not limitation, in order to aid in a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced in other embodiments departing from these specific details.

[0036] It should be noted that, in order to avoid obscuring the invention with unnecessary details, only the device structure and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0037] This invention provides a method for online detection and adjustment of coaxiality in a long-span, high-speed power generation system, wherein the method includes:

[0038] Step 1: Install the first bearing housing (1# bearing housing) and the second bearing housing (2# bearing housing) of the Brayton cycle engine system into the motor housing. Use a coaxiality detection device to measure the coaxiality of the two bearing housings and record the first coaxiality value Φ0 and the first eccentricity angle θ0.

[0039] Step 2: Install the reference replacement fixture of the online assembly and adjustment equipment onto the first bearing seat in the motor housing. The online assembly and adjustment equipment also includes a base, a rotating shaft, a self-aligning frequency tuner, a triangular chuck, a left column, a right column, a lower left mounting seat, an upper left mounting seat, a lower right mounting seat, an upper right mounting seat, a first sensor (sensor 1), a second sensor (sensor 2), a third sensor (sensor 3), a fourth sensor (sensor 4), and a coaxiality assessment module. The self-aligning frequency tuner is set at the center of the base via the rotating shaft, and the chuck is set on the self-aligning frequency tuner. The left and right columns are respectively set on the left and right sides of the base. The upper left and lower left mounting seats are movably set on the left column, and the upper right and lower right mounting seats are movably set on the right column. The first sensor is set on the lower left mounting seat, the third sensor is set on the lower right mounting seat, the second sensor is set on the upper left mounting seat, and the fourth sensor is set on the upper right mounting seat.

[0040] Step 3: Install the reference conversion fixture and the motor housing together onto the self-aligning frequency converter, and use the triangular chuck to fix the reference conversion fixture.

[0041] Step 4: Use the first sensor to measure the upper end face of the reference conversion fixture, use the third sensor to measure the lower end face of the reference conversion fixture, use the second sensor to measure the inner circle of the second bearing seat in the motor housing, and use the fourth sensor to measure the upper end face of the motor housing.

[0042] Step 5: Use the coaxiality evaluation module to evaluate the second coaxiality Φ1 and the second eccentricity angle θ1 of the second bearing housing in the motor housing relative to the first bearing housing. Compare the second coaxiality Φ1 and the second eccentricity angle θ1 with the first coaxiality Φ0 and the first eccentricity angle θ0 respectively, and determine whether the first requirement is met based on the comparison results. If the first requirement is not met, adjust the tilt angle and eccentricity of the self-aligning frequency tuner until the requirement is met.

[0043] Step 6: Assemble the connecting casing and the third bearing housing (3# bearing housing) in the Brayton cycle engine system according to their relative positions. Set multiple locating pins in a circumferentially evenly distributed manner at the connecting flange of the connecting casing and the third bearing housing, install the matching fasteners, and tighten the fasteners to the specified torque.

[0044] Step 7: Keep the motor housing and the online assembly and adjustment equipment in the same position, and place the connecting housing equipped with the third bearing seat on the motor housing. At this time, the connecting housing and the motor housing are not equipped with fasteners.

[0045] Before setting up the connecting housing, the second and fourth sensors can be removed, and then moved back when needed.

[0046] Step 8: Measure the inner cylindrical surface of the third bearing housing using the second sensor, measure the upper end face of the third bearing housing using the fourth sensor, and evaluate the third coaxiality Φ2 and third eccentricity angle θ2 of the third bearing housing relative to the first bearing housing using the coaxiality evaluation module. Calculate the fourth coaxiality Φ between the third and second bearing housings based on the vector addition principle. 1-2 And determine the third coaxiality Φ2 and the fourth coaxiality Φ 1-2 Check if the second requirement is met. If not, adjust the relative position between the connecting housing and the motor housing until the second requirement is met. Tighten the fasteners between the connecting housing and the motor housing. After installation, record the third coaxiality Φ2 and the fourth coaxiality Φ. 1-2 With the third eccentricity angle θ2;

[0047] Step 9: Assemble the compressor exhaust casing on the third bearing housing, install and tighten the fasteners between the compressor exhaust casing and the third bearing housing;

[0048] Before installing the compressor exhaust casing, the second and fourth sensors can be removed and then moved back when needed.

[0049] Step 10: Place the fourth bearing housing (bearing housing #4) of the Brayton cycle engine system onto the compressor exhaust casing according to its relative position. At this time, the fasteners between the fourth bearing housing and the compressor exhaust casing are not installed. Use the second sensor to measure the inner cylindrical surface of the fourth bearing housing, and use the fourth sensor to measure the upper end face of the fourth bearing housing. Use the coaxiality evaluation module to evaluate the fifth coaxiality Φ3 and the fourth eccentricity angle θ3 of the fourth bearing housing relative to the first bearing housing. Calculate the sixth coaxiality Φ between the third and second bearing housings according to the vector addition principle. 1-3 Calculate the seventh coaxiality Φ between the fourth bearing housing and the second bearing housing. 2-3 And determine the fifth coaxiality Φ3 and the sixth coaxiality Φ 1-3 Coaxiality Φ of the seventh 2-3 Check if the third requirement is met. If not, adjust the relative position between the fourth bearing housing and the compressor exhaust casing until the third requirement is met. Tighten the fasteners between the fourth bearing housing and the compressor exhaust casing. After installation, record the fifth coaxiality Φ3 and the sixth coaxiality Φ. 1-3 7th coaxiality Φ 2-3 With the fourth eccentricity angle θ3;

[0050] Step 11: Remove the assembled motor housing, connecting housing, third bearing housing, compressor exhaust housing, and fourth bearing housing (including the first and second bearing housings) from the online assembly equipment in their installed state. Set multiple locating pins evenly distributed circumferentially at the connecting flange between the fourth bearing housing and the compressor exhaust housing, and set multiple locating pins evenly distributed circumferentially at the connecting flange between the compressor exhaust housing and the third bearing housing. Then disassemble the motor housing and connecting housing, the connecting housing and the third bearing housing, the third bearing housing and the compressor exhaust housing, and the compressor exhaust housing and the fourth bearing housing.

[0051] Step 12: During the assembly of the Brayton cycle power generation system, the casings and the corresponding bearings are assembled according to the positional relationship constrained by the locating pins, thereby satisfying the coaxiality assembly requirements between the four bearing seats.

[0052] The above technical solution can be used to evaluate the coaxiality of the four bearing seats and make adjustments based on the evaluation results to ensure the assembly quality of each component, thereby meeting the high-precision assembly requirements of the closed Brayton cycle power generation system for the coaxiality of the pivot points.

[0053] Specifically, this method is applicable to online testing and adjustment of high-speed power generation systems with long spans, high speeds, and multiple bearing supports.

[0054] According to one embodiment of the present invention, determining whether the first requirement is met based on the comparison result includes:

[0055] If |Φ1-Φ0|≥0.001mm or |θ1-θ0|≥1°, then the first requirement is not met;

[0056] If |Φ1-Φ0|<0.001mm and |θ1-θ0|<1°, then the first requirement is met.

[0057] According to one embodiment of the present invention, the third coaxiality Φ2 and the fourth coaxiality Φ are determined. 1-2 Whether the second requirement is met includes:

[0058] If Φ2>0.02mm or Φ 1-2 If the value is greater than 0.02mm, then the second requirement is not met;

[0059] If Φ2≤0.02mm and Φ 1-2 If the value is ≤0.02mm, then the second requirement is met.

[0060] According to one embodiment of the present invention, the fifth coaxiality Φ3 and the sixth coaxiality Φ are determined. 1-3 Coaxiality Φ of the seventh 2-3 Whether the third requirement is met includes:

[0061] If Φ3>0.02mm or Φ1-3 >0.02mm or Φ 2-3 If the value is greater than 0.02mm, then the third requirement is not met;

[0062] If Φ3≤0.02mm and Φ 1-3 ≤0.02mm and Φ 2-3 If the value is ≤0.02mm, then the third requirement is met.

[0063] According to one embodiment of the present invention, the coaxiality detection device is a coordinate measuring machine or a coaxiality meter.

[0064] According to one embodiment of the present invention, four locating pins are evenly distributed circumferentially at the connecting flange between the connecting casing and the third bearing housing, four locating pins are evenly distributed circumferentially at the connecting flange between the fourth bearing housing and the compressor exhaust casing, and four locating pins are evenly distributed circumferentially at the connecting flange between the compressor exhaust casing and the third bearing housing.

[0065] The following is combined Figure 1-4 The present invention describes the online coaxiality detection and adjustment method for a long-span, high-speed power generation system. Specifically, the method includes:

[0066] Step 1: Install bearing housings #1 and #2 from the Brayton cycle engine system into the motor housing. Use a coordinate measuring machine or coaxiality meter to measure the coaxiality of the two bearing housings and record the coaxiality value Φ0 and phase θ0.

[0067] Step 2: Install the reference fitting into the No. 1 bearing housing of the motor housing.

[0068] Step 3: Install the reference conversion fixture and the motor housing together onto the rotary table of the high-precision online assembly and adjustment equipment, and fix the reference conversion fixture in place using a triangular chuck.

[0069] Step 4: Use sensor #1 of the online assembly and adjustment equipment to measure the upper end face of the reference conversion fixture, use sensor #3 of the online assembly and adjustment equipment to measure the lower end face of the reference conversion fixture, use sensor #2 of the online assembly and adjustment equipment to measure the inner cylindrical surface of bearing seat #2 of the motor casing, and use sensor #4 of the online assembly and adjustment equipment to measure the upper end face of the motor casing.

[0070] Step 5: Using the coaxiality evaluation module of the online assembly and adjustment equipment, evaluate the coaxiality Φ1 and eccentricity angle θ1 of the motor housing #2 bearing seat relative to #1 bearing seat. Compare this with the coaxiality Φ0 and eccentricity angle θ0 measured by a coordinate measuring machine or coaxiality meter. If |Φ1-Φ0|≥0.001mm and |θ1-θ0|≥1°, adjust the tilt angle and eccentricity of the online assembly and adjustment equipment's self-aligning and frequency tuning station until |Φ1-Φ0|<0.001mm and |θ1-θ0|<1°.

[0071] Step 6: Assemble the connecting housing and bearing housing #3 according to their relative positions. Install four precision locating pins evenly distributed around the connecting flange in a circumferential direction, install the matching fasteners, and tighten them to the specified torque.

[0072] Step 7: Keep the motor housing and the online assembly and adjustment equipment in their original positions, remove the No. 2 and No. 4 sensors of the online assembly and adjustment equipment, and assemble the connecting housing and the No. 3 bearing seat in sequence. At this time, the fasteners between the connecting housing and the motor housing are not assembled yet.

[0073] Step 8: Measure the inner cylindrical surface of bearing housing #3 using sensor #2 of the online assembly and adjustment equipment, and measure the upper end face of bearing housing #3 using sensor #4. Utilize the coaxiality assessment module of the online assembly and adjustment equipment to assess the coaxiality Φ2 and eccentricity angle θ2 of bearing housing #3 relative to bearing housing #1. Calculate the coaxiality Φ between bearing housing #3 and bearing housing #2 using the principle of vector addition. 1-2 Adjust the relative positions between the connecting housing and the motor housing until Φ2 ≤ 0.02mm and Φ 1-2 ≤0.02mm. Tighten the fasteners between the connecting housing and the motor housing. After installation, record Φ2 and Φ 1-2 With θ2.

[0074] Step 9: Remove sensors #2 and #4 from the online assembly and adjustment equipment, assemble the compressor exhaust casing, install and tighten the fasteners between the exhaust casing and bearing #3.

[0075] Step 10: Install bearing housing #4. Do not install the fasteners between bearing housing #4 and the compressor exhaust casing yet. Use sensor #2 of the online assembly and adjustment equipment to measure the inner cylindrical surface of bearing housing #4. Use sensor #4 to measure the upper end face of bearing housing #4. Use the coaxiality assessment module of the online assembly and adjustment equipment to assess the coaxiality Φ3 and eccentricity angle θ3 of bearing housing #4 relative to bearing housing #1. Calculate the coaxiality Φ between bearing housing #3 and bearing housing #2 using the vector addition principle. 1-3 Calculate the coaxiality Φ between bearing housing #4 and bearing housing #2. 2-3 Adjust the relative position between the No. 4 pivot bearing housing and the compressor exhaust casing until Φ3 ≤ 0.02mm and Φ 1-3 ≤0.02mm, Φ 2-3 ≤0.02mm, tighten the fasteners between bearing housing #4 and compressor exhaust casing, and record Φ3 and Φ after installation. 1-3 Φ 2-3 With θ3.

[0076] Step 11: Remove all assembled parts (casing and bearing housing) from the online assembly equipment in their installed state. Install four precision locating pins evenly distributed around the circumference at the connecting flange between bearing housing #4 and compressor exhaust casing, and install four precision locating pins evenly distributed around the circumference at the connecting flange between compressor exhaust casing and bearing housing #3. Then disassemble the parts (casing and bearing housing).

[0077] Step 12: During the formal assembly of the Brayton cycle power generation system, each casing is assembled according to the positional relationship constrained by the locating pins, thereby satisfying the coaxiality assembly requirements between the four bearing seats.

[0078] The features described and / or illustrated above with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, and / or in combination with or in lieu of features in other embodiments.

[0079] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, components, or combinations thereof.

[0080] The apparatus and methods described above can be implemented in hardware or in combination with software. This invention relates to computer-readable programs that, when executed by a logic component, enable that logic component to implement the apparatus or constituent parts described above, or to implement the various methods or steps described above. This invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, etc.

[0081] Many features and advantages of these embodiments are apparent from this detailed description, and therefore the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. Furthermore, since many modifications and alterations will readily occur to those skilled in the art, the embodiments of the invention are not intended to be limited to the precise structures and operations illustrated and described, but rather to encompass all suitable modifications and equivalents falling within their scope.

[0082] The parts of this invention not described in detail are techniques known to those skilled in the art.

Claims

1. A method for online detection and adjustment of coaxiality in a long-span, high-speed power generation system, characterized in that, The method includes: Step 1: Install the first and second bearing housings of the Brayton cycle engine system into the motor housing. Use a coaxiality detection device to measure the coaxiality of the two bearing housings and record the first coaxiality value Φ0 and the first eccentricity angle θ0. Step 2: Install the reference replacement fixture of the online assembly and adjustment equipment onto the first bearing seat in the motor housing. The online assembly and adjustment equipment also includes a base, a rotating shaft, a self-aligning frequency tuner, a triangular chuck, a left column, a right column, a lower left mounting seat, an upper left mounting seat, a lower right mounting seat, an upper right mounting seat, a first sensor, a second sensor, a third sensor, a fourth sensor, and a coaxiality assessment module. The self-aligning frequency tuner is set at the center of the base via the rotating shaft. The chuck is set on the self-aligning frequency tuner. The left and right columns are respectively set on the left and right sides of the base. The upper left and lower left mounting seats are movably set on the left column, and the upper right and lower right mounting seats are movably set on the right column. The first sensor is set on the lower left mounting seat, the third sensor is set on the lower right mounting seat, the second sensor is set on the upper left mounting seat, and the fourth sensor is set on the upper right mounting seat. Step 3: Install the reference conversion fixture and the motor housing together onto the self-aligning frequency converter, and use the triangular chuck to fix the reference conversion fixture. Step 4: Use the first sensor to measure the upper end face of the reference conversion fixture, use the third sensor to measure the lower end face of the reference conversion fixture, use the second sensor to measure the inner circle of the second bearing seat in the motor housing, and use the fourth sensor to measure the upper end face of the motor housing. Step 5: Use the coaxiality evaluation module to evaluate the second coaxiality Φ1 and the second eccentricity angle θ1 of the second bearing housing in the motor housing relative to the first bearing housing. Compare the second coaxiality Φ1 and the second eccentricity angle θ1 with the first coaxiality Φ0 and the first eccentricity angle θ0 respectively, and determine whether the first requirement is met based on the comparison results. If the first requirement is not met, adjust the tilt angle and eccentricity of the self-aligning frequency tuner until the requirement is met. Step 6: Assemble the connecting casing and the third bearing housing in the Brayton cycle engine system according to their relative positions. Set multiple locating pins in a circumferentially evenly distributed manner at the connecting flange of the connecting casing and the third bearing housing, install the matching fasteners, and tighten the fasteners to the specified torque. Step 7: Keep the motor housing and the online assembly and adjustment equipment in the same position, and place the connecting housing equipped with the third bearing seat on the motor housing. At this time, the connecting housing and the motor housing are not equipped with fasteners. Step 8: Measure the inner cylindrical surface of the third bearing housing using the second sensor, measure the upper end face of the third bearing housing using the fourth sensor, and evaluate the third coaxiality Φ2 and third eccentricity angle θ2 of the third bearing housing relative to the first bearing housing using the coaxiality evaluation module. Calculate the fourth coaxiality Φ between the third and second bearing housings based on the vector addition principle. 1-2 And determine the third coaxiality Φ2 and the fourth coaxiality Φ 1-2 Check if the second requirement is met. If not, adjust the relative position between the connecting housing and the motor housing until the second requirement is met. Tighten the fasteners between the connecting housing and the motor housing. After installation, record the third coaxiality Φ2 and the fourth coaxiality Φ. 1-2 With the third eccentricity angle θ2; Step 9: Assemble the compressor exhaust casing on the third bearing housing, install and tighten the fasteners between the compressor exhaust casing and the third bearing housing; Step 10: Place the fourth bearing housing in the Brayton cycle engine system onto the compressor exhaust casing according to their relative positions. At this time, the fasteners between the fourth bearing housing and the compressor exhaust casing are not installed. Use the second sensor to measure the inner cylindrical surface of the fourth bearing housing, and use the fourth sensor to measure the upper end face of the fourth bearing housing. Use the coaxiality assessment module to assess the fifth coaxiality Φ3 and the fourth eccentricity angle θ3 of the fourth bearing housing relative to the first bearing housing. Calculate the sixth coaxiality Φ between the third and second bearing housings according to the vector addition principle. 1-3 Calculate the seventh coaxiality Φ between the fourth bearing housing and the second bearing housing. 2-3 And determine the fifth coaxiality Φ3 and the sixth coaxiality Φ 1-3 Coaxiality Φ of the seventh 2-3 Check if the third requirement is met. If not, adjust the relative position between the fourth bearing housing and the compressor exhaust casing until the third requirement is met. Tighten the fasteners between the fourth bearing housing and the compressor exhaust casing. After installation, record the fifth coaxiality Φ3 and the sixth coaxiality Φ. 1-3 7th coaxiality Φ 2-3 With the fourth eccentricity angle θ3; Step 11: Remove the assembled motor housing, connecting housing, third bearing housing, compressor exhaust housing, and fourth bearing housing (including the first and second bearing housings) from the online assembly equipment in their installed state. Set multiple locating pins evenly distributed circumferentially at the connecting flange between the fourth bearing housing and the compressor exhaust housing, and set multiple locating pins evenly distributed circumferentially at the connecting flange between the compressor exhaust housing and the third bearing housing. Then disassemble the motor housing and connecting housing, the connecting housing and the third bearing housing, the third bearing housing and the compressor exhaust housing, and the compressor exhaust housing and the fourth bearing housing. Step 12: During the assembly of the Brayton cycle power generation system, the casings and the corresponding bearing housings are assembled according to the positional relationship constrained by the locating pins.

2. The method according to claim 1, characterized in that, Determining whether the first requirement is met based on the comparison results includes: If |Φ1-Φ0|≥0.001mm or |θ1-θ0|≥1°, then the first requirement is not met; If |Φ1-Φ0|<0.001mm and |θ1-θ0|<1°, then the first requirement is met.

3. The method according to claim 2, characterized in that, Determine the third coaxiality Φ2 and the fourth coaxiality Φ 1-2 Whether the second requirement is met includes: If Φ2>0.02mm or Φ 1-2 If the value is greater than 0.02mm, then the second requirement is not met; If Φ2≤0.02mm and Φ 1-2 If the value is ≤0.02mm, then the second requirement is met.

4. The method according to claim 3, characterized in that, Determine the fifth coaxiality Φ3 and the sixth coaxiality Φ 1-3 Coaxiality Φ of the seventh 2-3 Whether the third requirement is met includes: If Φ3>0.02mm or Φ 1-3 >0.02mm or Φ 2-3 If the value is greater than 0.02mm, then the third requirement is not met; If Φ3≤0.02mm and Φ 1-3 ≤0.02mm and Φ 2-3 If the value is ≤0.02mm, then the third requirement is met.

5. The method according to any one of claims 1-4, characterized in that, The coaxiality testing device is a coordinate measuring machine or a coaxiality meter.

6. The method according to any one of claims 1-5, characterized in that, Four locating pins are evenly distributed circumferentially at the connecting flange between the connecting casing and the third bearing housing; four locating pins are evenly distributed circumferentially at the connecting flange between the fourth bearing housing and the compressor exhaust casing; and four locating pins are evenly distributed circumferentially at the connecting flange between the compressor exhaust casing and the third bearing housing.

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