Rotor floating height calculation method and device, electronic equipment, storage medium and program product

Abstract

The invention discloses a rotor floating height calculation method and device, electronic equipment, a storage medium and a program product. The method comprises the following steps: acquiring the output voltage of a first eddy current sensor and a second eddy current sensor, the center temperature of a rotor, the surface temperature of the rotor and the radius of the rotor, and calculating the floating height of the rotor according to the output voltage, the center temperature, the surface temperature and the radius. According to the technical scheme provided by the embodiment of the invention, the influence of the temperature change of the rotor on the radius of the rotor is considered, so that the floating height of the rotor is corrected, the error caused by the temperature change of the rotor in the existing measurement process of the floating height of the rotor is effectively avoided, and the calculation precision of the floating height of the rotor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor dynamics measurement and calculation, and in particular to a method, device, electronic equipment, storage medium and program product for calculating the floating height of a rotor. Background Art

[0002] During the high-speed rotation of the rotor of rotating equipment (steam turbines, fans, machine tools, etc.), under the influence of fluid dynamics such as bearings and seals, the rotor will be displaced relative to stationary parts such as bearings and seals. This is called the change in the rotor's axial position, also known as the change in the rotor's floating height.

[0003] At present, the known method for measuring the floating height of the rotor is to install two orthogonal eddy current sensors along the axial section of the rotor perpendicular to the rotor axis, and use the average voltage output by the two eddy current sensors to calculate the distance between the two orthogonally installed eddy current sensors and the rotor surface, and then calculate the floating height of the rotor. In the calculation process, the rotor diameter is assumed to remain unchanged.

[0004] But in fact, the rotor temperature of equipment such as steam turbines, feed pumps, and machine tools will change with the working conditions. For example, the rotor temperature of a steam turbine rotor is basically the same as the ambient temperature when it is cold. During normal operation, due to the heating effect of steam on the rotor, the highest rotor temperature will reach over 500°C. The center temperature of the rotor near the end and the bearing exceeds 100°C, and the surface temperature is similar to the bearing temperature at about 40 to 100°C. Taking a rotor with a radius of 200mm as an example, if the steam turbine is in a cranking state, the center temperature of the rotor remains unchanged, and the lubricating oil temperature rises from 10°C to 30°C due to environmental influences, that is, the average rotor temperature rises by 10°C. The expansion coefficient α is taken as 12×10 -6 / ℃, the rotor radius changes to 200×12×10 -6 ×10mm=0.024mm, usually the rotor floating height is between 0.1 and 0.2mm, this error is quite objective for the accurate measurement of the rotor floating height, and needs to be corrected. After the turbine rotor is running, assuming that the average rotor temperature rises by 50℃, the rotor radius increases by 0.12mm, which brings an error to the calculation of the rotor floating height, which is equivalent to the actual rotor floating height, and must be corrected, otherwise the measurement result will have serious errors.

[0005] In order to overcome the error caused by rotor temperature change in the existing rotor floating height measurement process, the patent of the present invention provides a method for calculating the rotor floating height taking into account the rotor temperature change. Summary of the invention

[0006] The invention provides a method, device, electronic equipment, storage medium and program product for calculating the floating height of a rotor, so as to solve the technical problem of measurement error caused by rotor temperature change in the existing rotor floating height measurement process.

[0007] According to one aspect of the present invention, a method for calculating the floating height of a rotor is provided, which is implemented by a rotor floating height measurement system, wherein the measurement system comprises a first eddy current sensor, a second eddy current sensor and a rotor, wherein the first eddy current sensor and the second eddy current sensor are in an orthogonal relationship, the first eddy current sensor and the second eddy current sensor are installed perpendicular to the axis of the rotor, and the first eddy current sensor and the second eddy current sensor are both at an angle of 45° to the horizontal plane;

[0008] The calculation method includes:

[0009] Obtaining output voltages of the first eddy current sensor and the second eddy current sensor, a center temperature of the rotor, a surface temperature of the rotor, and a radius of the rotor;

[0010] A rotor floating height is calculated according to the output voltage, the center temperature, the surface temperature, and the radius.

[0011] Optionally, obtaining the output voltages of the first eddy current sensor and the second eddy current sensor includes:

[0012] Acquire a first output voltage and a second output voltage of the first eddy current sensor;

[0013] Acquiring a third output voltage and a fourth output voltage of the second eddy current sensor;

[0014] Acquire a first center temperature and a second center temperature of the rotor;

[0015] A first surface temperature and a second surface temperature of the rotor are obtained.

[0016] Optionally, calculating the rotor floating height according to the output voltage, the center temperature, the surface temperature and the radius includes:

[0017] Calculating a first distance between the first eddy current sensor and the rotor according to the first output voltage, the second output voltage and a preset sensitivity;

[0018] Calculating a second distance between the second eddy current sensor and the rotor according to the third output voltage, the fourth output voltage and the preset sensitivity;

[0019] Calculating a change in the radius of the rotor according to the first center temperature, the second center temperature, the first surface temperature, the second surface temperature, the radius, and a preset linear expansion coefficient;

[0020] The rotor floating height is calculated according to the first distance, the second distance and the rotor radius change.

[0021] Optionally, calculating the rotor floating height according to the first distance, the second distance and the rotor radius change includes:

[0022] Determine the X displacement and Y displacement of the rotor in the X and Y coordinate systems through coordinate system conversion according to the first distance and the second distance;

[0023] The rotor floating height is calculated according to the X displacement, the Y displacement and the rotor radius change.

[0024] Optionally, calculating the first distance between the first eddy current sensor and the rotor according to the first output voltage, the second output voltage and a preset sensitivity includes:

[0025] The first distance between the first eddy current sensor and the rotor is calculated using the following formula:

[0026] X'=K(Ua2-Ua1); wherein X' is the first distance, K is the preset sensitivity, Ua1 is the first output voltage, and Ua2 is the second output voltage;

[0027] Calculating a second distance between the second eddy current sensor and the rotor according to the third output voltage, the fourth output voltage and the preset sensitivity includes:

[0028] The second distance between the second eddy current sensor and the rotor is calculated using the following formula:

[0029] Y'=K(Ub2-Ub1); wherein Y' is the second distance, K is the preset sensitivity, Ub1 is the third output voltage, and Ub2 is the fourth output voltage;

[0030] Calculating the rotor radius change according to the first center temperature, the second center temperature, the first surface temperature, the second surface temperature, the radius, and a preset linear expansion coefficient includes:

[0031] The rotor radius change is calculated using the following formula:

[0032] R'-R=αR(T c2 +T o2 -T c1 -To1 ) / 2; where R'-R is the change in the rotor radius, α is the preset linear expansion coefficient, R is the radius of the rotor, T c1 is the first center temperature, T c2 is the second center temperature, T o1 is the first surface temperature, T o2 is the second surface temperature.

[0033] Optionally, determining the X displacement and the Y displacement of the rotor in the X and Y coordinate systems by coordinate system conversion according to the first distance and the second distance includes:

[0034] The X displacement and Y displacement of the rotor in the X and Y coordinate systems should satisfy the following formula:

[0035] X=K(Ua2-Ua1)cos45°-K(Ub2-Ub1)sin45°;wherein, X is the X displacement;

[0036] Y=K(Ua2-Ua1)sin45°+K(Ub2-Ub1)cos45°;wherein, Y is the Y displacement;

[0037] Calculating the rotor floating height according to the X displacement, the Y displacement and the rotor radius change includes:

[0038] The rotor float height is calculated using the following formula:

[0039] X=[K(Ua2-Ua1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]cos45°-

[0040] [K(Ub2-Ub1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]sin45°;

[0041] Y=[K(Ua2-Ua1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]sin45°+

[0042] [K(Ub2-Ub1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]cos45°.

[0043] According to another aspect of the present invention, there is provided a device for calculating a rotor floating height, comprising:

[0044] An acquisition module, wherein the acquisition module is used to acquire the output voltages of the first eddy current sensor and the second eddy current sensor, the center temperature of the rotor, the surface temperature of the rotor, and the radius of the rotor;

[0045] A calculation module is used to calculate the rotor floating height according to the output voltage, the center temperature, the surface temperature and the radius.

[0046] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0047] at least one processor; and

[0048] a memory communicatively connected to the at least one processor; wherein,

[0049] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for calculating the rotor floating height described in any embodiment of the present invention.

[0050] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for calculating the rotor floating height described in any embodiment of the present invention when executed.

[0051] According to another aspect of the present invention, a computer program product is provided, characterized in that the computer program product comprises a computer program, and when the computer program is executed by a processor, the method for calculating the floating height of the rotor according to any embodiment of the present invention is implemented.

[0052] The technical solution provided by the embodiment of the present invention calculates the floating height of the rotor according to the output voltage, the center temperature, the surface temperature and the radius of the rotor by acquiring the output voltage of the first eddy current sensor and the second eddy current sensor, the center temperature of the rotor, the surface temperature of the rotor and the radius of the rotor. The technical solution provided by the embodiment of the present invention takes into account the influence of the rotor temperature change on the rotor radius, and then corrects the floating height of the rotor, effectively avoiding the error caused by the rotor temperature change in the existing rotor floating height measurement process, and improving the accuracy of the calculation of the rotor floating height.

[0053] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0055] Figure 1 A flow chart of a method for calculating a rotor floating height provided by an embodiment of the present invention;

[0056] Figure 2 A diagram of a rotor floating height measurement system provided by an embodiment of the present invention;

[0057] Figure 3 A flow chart of another method for calculating the floating height of a rotor provided in an embodiment of the present invention;

[0058] Figure 4 A schematic diagram of the structure of a device for calculating the floating height of a rotor provided in an embodiment of the present invention;

[0059] Figure 5 A schematic structural diagram of an electronic device for a method for calculating a rotor floating height provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0060] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0061] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0062] Figure 1 A flowchart of a method for calculating the floating height of a rotor provided by an embodiment of the present invention. The method can be executed by a device for calculating the floating height of a rotor. The device can be implemented in the form of hardware and / or software. The device can be configured in any electronic device with a communication function. Figure 1 , the calculation method includes:

[0063] S110, obtaining output voltages of the first eddy current sensor and the second eddy current sensor, a central temperature of the rotor, a surface temperature of the rotor, and a radius of the rotor.

[0064] The calculation method of the rotor floating height is realized by the rotor floating height measurement system. Figure 2 A rotor floating height measurement system diagram provided by an embodiment of the present invention, see Figure 2 The measuring system includes a first eddy current sensor 1, a second eddy current sensor 2 and a rotor 3. The first eddy current sensor 1 and the second eddy current sensor 2 are orthogonal. The first eddy current sensor 1 and the second eddy current sensor 2 are installed perpendicular to the axis of the rotor 3. The first eddy current sensor 1 and the second eddy current sensor 2 are both at an angle of 45° to the horizontal plane. The eddy current sensor can statically and dynamically measure the distance between the measured metal conductor and the probe surface in a non-contact, high-linearity and high-resolution manner. It is a non-contact linear metrology tool. The eddy current sensor can accurately measure the static and dynamic relative displacement changes between the measured object (must be a metal conductor) and the probe end face. The output voltage includes the first output voltage and the second output voltage of the first eddy current sensor; the third output voltage and the fourth output voltage of the second eddy current sensor; the center temperature includes the first center temperature and the second center temperature of the rotor; the surface temperature includes the first surface temperature and the second surface temperature of the rotor.

[0065] Specifically, the output voltage is output by the eddy current sensor, the center temperature of the rotor is obtained by simulation calculation, the surface temperature of the rotor is approximately the bearing temperature, and the bearing temperature can be determined by measuring the temperature of the lubricating oil on the bearing. The radius of the rotor can be obtained by querying the factory parameters.

[0066] S120, calculating the rotor floating height according to the output voltage, the center temperature, the surface temperature and the radius.

[0067] Specifically, the distance between the eddy current sensor and the rotor surface is determined according to the output voltage of the eddy current sensor, and the distance between the eddy current sensor and the rotor surface is converted into the displacement of the rotor in the X, Y coordinate system through coordinate system conversion; the radius change of the rotor is determined according to the center temperature and surface temperature of the rotor, and the rotor floating height is calculated according to the radius change of the rotor and the displacement of the rotor in the X, Y coordinate system.

[0068] The technical solution provided by the embodiment of the present invention calculates the floating height of the rotor according to the output voltage, the center temperature, the surface temperature and the radius of the rotor by acquiring the output voltage of the first eddy current sensor and the second eddy current sensor, the center temperature of the rotor, the surface temperature of the rotor and the radius of the rotor. The technical solution provided by the embodiment of the present invention takes into account the influence of the rotor temperature change on the rotor radius, and then corrects the floating height of the rotor, effectively avoiding the error caused by the rotor temperature change in the existing rotor floating height measurement process, and improving the accuracy of the calculation of the rotor floating height.

[0069] Optionally, calculating the rotor floating height according to the output voltage, the center temperature, the surface temperature and the radius includes:

[0070] A first distance between the first eddy current sensor and the rotor is calculated according to the first output voltage, the second output voltage and a preset sensitivity.

[0071] The voltage values ​​output by the first eddy current sensor and the second eddy current sensor are proportional to the distance between the sensor and the rotor, and the ratio is . The sensitivity K is determined by the sensor itself.

[0072] Specifically, see Figure 3 , Figure 3 A flowchart of another method for calculating the floating height of a rotor provided in an embodiment of the present invention, wherein the first distance between the first eddy current sensor and the rotor is calculated using the following formula:

[0073] X'=K(Ua2-Ua1); wherein X' is the first distance, K is the preset sensitivity, Ua1 is the first output voltage, and Ua2 is the second output voltage.

[0074] A second distance between the second eddy current sensor and the rotor is calculated according to the third output voltage, the fourth output voltage and a preset sensitivity.

[0075] Specifically, the second distance between the second eddy current sensor and the rotor is calculated using the following formula:

[0076] Y'=K(Ub2-Ub1); wherein Y' is the second distance, K is the preset sensitivity, Ub1 is the third output voltage, and Ub2 is the fourth output voltage.

[0077] The rotor radius change is calculated according to the first center temperature, the second center temperature, the first surface temperature, the second surface temperature, the radius, and a preset linear expansion coefficient.

[0078] Specifically, the following formula is used to calculate the rotor radius change:

[0079] R'-R=αR(T c2 +T o2 -T c1 -T o1 ) / 2; where R'-R is the change in rotor radius, α is the preset linear expansion coefficient, R is the radius of the rotor, T c1 is the first center temperature, T c2 is the second center temperature, T o1 is the first surface temperature, T o2 is the second surface temperature.

[0080] The rotor floating height is calculated according to the first distance, the second distance and the change in the rotor radius.

[0081] Optionally, calculating the rotor floating height according to the first distance, the second distance and the change in the rotor radius includes: determining the X displacement and Y displacement of the rotor in the X, Y coordinate system through coordinate system conversion according to the first distance and the second distance; and calculating the rotor floating height according to the X displacement, the Y displacement and the change in the rotor radius.

[0082] Specifically, the X displacement and Y displacement of the rotor in the X and Y coordinate systems should satisfy the following formula:

[0083] X=K(Ua2-Ua1)cos45°-K(Ub2-Ub1)sin45°; where X is the X displacement;

[0084] Y=K(Ua2-Ua1)sin45°+K(Ub2-Ub1)cos45°; where Y is the Y displacement.

[0085] The rotor float height is calculated using the following formula:

[0086] X=[K(Ua2-Ua1)-1.41αR(Tc2 +T o2 -T c1 -T o1 ) / 2]cos45°-

[0087] [K(Ub2-Ub1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]sin45°;

[0088] Y=[K(Ua2-Ua1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]sin45°+

[0089] [K(Ub2-Ub1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]cos45°.

[0090] The following is a specific example to introduce the method for calculating the rotor floating height provided in the present application.

[0091] When the rotor diameter remains unchanged, assuming that the output voltages of the first eddy current sensor and the second eddy current sensor change from Ua1 and Ub1 to Ua2 and Ub2 respectively, the distances between the first eddy current sensor and the second eddy current sensor and the rotor surface change as follows: X'=K(Ua2-Ua1), Y'=K(Ub2-Ub1). Through coordinate system conversion, the displacement of the rotor in the X and Y coordinate systems is X=X'cos45°-Y? sin45°, Y=X'sin45°+Y? cos45°. That is, X=K(Ua2-Ua1)cos45°-K(Ub2-Ub1)sin45°

[0092] Y=K(Ua2-Ua1)sin45°+K(Ub2-Ub1)cos45°(1)

[0093] Formula 1 is a calculation formula that does not take into account the change in rotor diameter caused by temperature change.

[0094] When the shaft diameter changes due to the change in rotor temperature, assuming that the output voltages of the first eddy current sensor and the second eddy current sensor change from Ua1 and Ub1 to Ua2 and Ub2 respectively, the average temperature of the rotor changes from T1 to T2, and the rotor radius changes from R to R'. Considering that the rotor radius R is much larger than the rotor radius change R'-R caused by temperature, formula 1 is corrected to: X = [K(Ua2-Ua1)-1.41(R?-R)]cos45°-[K(Ub2-Ub1)-1.41(R?-R)]sin45°;

[0095] Y=[K(Ua2-Ua1)-1.41(R?-R)]sin45°+[K(Ub2-Ub1)-1.41(R?-R)]cos45°(2)

[0096] During the operation of rotating equipment such as steam turbines, the rotor center temperature is obtained through simulation calculation, and the rotor surface temperature is approximately the bearing temperature. Assuming that the rotor center temperature obtained through simulation calculation is Tc and the bearing temperature is To, the average rotor temperature is (Tc+To) / 2, and the linear expansion coefficient of the rotor material is α. Assuming that the output voltages of sensors a and b change from Ua1 and Ub1 to Ua2 and Ub2 respectively, the rotor center temperature and the rotor surface temperature change from Tc1 and To1 to Tc2 and To2 respectively, then Formula 2 becomes:

[0097] X=[K(Ua2-Ua1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]cos45°-

[0098] [K(Ub2-Ub1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]sin45°;

[0099] Y=[K(Ua2-Ua1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]sin45°+

[0100] [K(Ub2-Ub1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]cos45°(3)

[0101] Formula 3 is the calculation formula for the rotor floating height considering the effect of temperature. Among them, Y is the calculation formula for the floating height considering the effect of temperature on the change of rotor radius. It can also be seen from Formula 3 that the temperature change of the rotor has no effect on the X-direction value of the rotor axis position measurement.

[0102] According to the technical solution provided in the embodiment of the present invention, the influence of rotor temperature change on the rotor radius is taken into account, and the rotor floating height is corrected, which effectively avoids the error caused by rotor temperature change in the existing rotor floating height measurement process and improves the accuracy of the rotor floating height calculation.

[0103] Figure 4 A schematic diagram of a rotor floating height calculation device provided by an embodiment of the present invention, see Figure 4 , the computing device includes an acquisition module 410 and a computing module 420.

[0104] The acquisition module 410 is used to acquire the output voltages of the first eddy current sensor and the second eddy current sensor, the center temperature of the rotor, the surface temperature of the rotor, and the radius of the rotor.

[0105] The calculation module 420 is used to calculate the rotor floating height according to the output voltage, the center temperature, the surface temperature and the radius.

[0106] A rotor floating height calculation device provided in an embodiment of the present invention can execute a rotor floating height calculation method provided in any embodiment of the present invention, and has corresponding functional modules and beneficial effects of the execution method.

[0107] Figure 5 A schematic diagram of the structure of an electronic device for a method for calculating the floating height of a rotor provided by an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0108] like Figure 5As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0109] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0110] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a method for calculating the floating height of the rotor.

[0111] In some embodiments, a method for calculating the floating height of a rotor may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for calculating the floating height of a rotor described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute a method for calculating the floating height of a rotor in any other appropriate manner (e.g., by means of firmware).

[0112] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0113] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0114] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0115] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0116] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0117] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0118] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0119] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for calculating the floating height of a rotor, characterized in that: The method is implemented by a rotor floating height measurement system, wherein the measurement system comprises a first eddy current sensor, a second eddy current sensor and a rotor, wherein the first eddy current sensor and the second eddy current sensor are in an orthogonal relationship, the first eddy current sensor and the second eddy current sensor are installed perpendicular to the axis of the rotor, and the first eddy current sensor and the second eddy current sensor are both at an angle of 45° to the horizontal plane; The calculation method includes: Obtaining output voltages of the first eddy current sensor and the second eddy current sensor, a center temperature of the rotor, a surface temperature of the rotor, and a radius of the rotor; A rotor floating height is calculated according to the output voltage, the center temperature, the surface temperature, and the radius.

2. The calculation method according to claim 1, characterized in that: Acquiring the output voltages of the first eddy current sensor and the second eddy current sensor includes: Acquire a first output voltage and a second output voltage of the first eddy current sensor; Acquiring a third output voltage and a fourth output voltage of the second eddy current sensor; Acquire a first center temperature and a second center temperature of the rotor; A first surface temperature and a second surface temperature of the rotor are obtained.

3. The calculation method according to claim 2, characterized in that: The calculating the rotor floating height according to the output voltage, the center temperature, the surface temperature and the radius comprises: Calculating a first distance between the first eddy current sensor and the rotor according to the first output voltage, the second output voltage and a preset sensitivity; Calculating a second distance between the second eddy current sensor and the rotor according to the third output voltage, the fourth output voltage and the preset sensitivity; Calculating a change in the radius of the rotor according to the first center temperature, the second center temperature, the first surface temperature, the second surface temperature, the radius, and a preset linear expansion coefficient; The rotor floating height is calculated according to the first distance, the second distance and the rotor radius change.

4. The calculation method according to claim 3, characterized in that: The calculating the rotor floating height according to the first distance, the second distance and the rotor radius change comprises: Determine the X displacement and Y displacement of the rotor in the X and Y coordinate systems through coordinate system conversion according to the first distance and the second distance; The rotor floating height is calculated according to the X displacement, the Y displacement and the rotor radius change.

5. The calculation method according to claim 3, characterized in that: Calculating the first distance between the first eddy current sensor and the rotor according to the first output voltage, the second output voltage and a preset sensitivity comprises: The first distance between the first eddy current sensor and the rotor is calculated using the following formula: X'=K(Ua2-Ua1); wherein X' is the first distance, K is the preset sensitivity, Ua1 is the first output voltage, and Ua2 is the second output voltage; Calculating a second distance between the second eddy current sensor and the rotor according to the third output voltage, the fourth output voltage and the preset sensitivity includes: The second distance between the second eddy current sensor and the rotor is calculated using the following formula: Y'=K(Ub2-Ub1); wherein Y' is the second distance, K is the preset sensitivity, Ub1 is the third output voltage, and Ub2 is the fourth output voltage; Calculating the rotor radius change according to the first center temperature, the second center temperature, the first surface temperature, the second surface temperature, the radius, and a preset linear expansion coefficient includes: The rotor radius change is calculated using the following formula: R'-R=αR(T c2 +T o2 -T c1 -T o1 ) / 2; where R'-R is the change in the rotor radius, α is the preset linear expansion coefficient, R is the radius of the rotor, T c1 is the first center temperature, T c2 is the second center temperature, T o1 is the first surface temperature, T o2 is the second surface temperature.

6. The calculation method according to claim 4, characterized in that: Determining the X displacement and the Y displacement of the rotor in the X and Y coordinate systems by coordinate system conversion according to the first distance and the second distance includes: The X displacement and Y displacement of the rotor in the X and Y coordinate systems should satisfy the following formula: X=K(Ua2-Ua1)cos45°-K(Ub2-Ub1)sin45°;wherein, X is the X displacement; Y=K(Ua2-Ua1)sin45°+K(Ub2-Ub1)cos45°;wherein, Y is the Y displacement; Calculating the rotor floating height according to the X displacement, the Y displacement and the rotor radius change includes: The rotor float height is calculated using the following formula: X=[K(Ua2-Ua1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]cos45°-[K(Ub2-Ub1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]sin45°; Y=[K(Ua2-Ua1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]sin45°+[K(Ub2-Ub1)-1.41αR(T c2 +T o2 -T c1 -T o1 ) / 2]cos45°。 7. A device for calculating the floating height of a rotor, characterized in that: include: An acquisition module, wherein the acquisition module is used to acquire the output voltages of the first eddy current sensor and the second eddy current sensor, the center temperature of the rotor, the surface temperature of the rotor, and the radius of the rotor; A calculation module is used to calculate the rotor floating height according to the output voltage, the center temperature, the surface temperature and the radius.

8. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for calculating the rotor floating height according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for calculating the rotor floating height according to any one of claims 1 to 6 when the processor executes the instructions.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the computer program implements the method for calculating the rotor flying height according to any one of claims 1 to 6.

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