Integrated fault detection device of magnetic suspension expansion generator
By designing a fault detection device for magnetic levitation expansion generators including signal receiving end and signal processing hub module, the problem of difficult time detection of magnetic levitation expansion generators in low-temperature waste heat power generation system is solved, real-time detection and positioning of faults is achieved, maintenance costs are reduced and economic benefits are improved.
Patent Information
- Application Number
- CN202421544973.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-02
AI Technical Summary
In the existing low-temperature waste heat power generation system, it is difficult to detect the magnetic levitation expansion generator in a timely manner when a fault occurs, resulting in the failure information being unable to be obtained in time. Maintenance personnel need to gradually check, which is time-consuming and increases maintenance costs.
Design an integrated fault detection device for magnetic levitation expansion generator, including a housing, signal receiving end and signal processing hub module, and detects the fault status of the generator in real time and locates the fault by receiving current, temperature, voltage and displacement sensor signals.
Real-time detection of faults of magnetic levitation expansion generators in low-temperature waste heat power generation systems is achieved, which saves troubleshooting time, reduces maintenance costs, and improves economic benefits, while the device size is smaller.
Smart Images
Figure CN222812917U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fault detection, and more specifically, relates to an integrated fault detection device for a magnetic suspension expansion generator. Background Art
[0002] The low-temperature waste heat power generation system converts the low-temperature waste heat generated in the industrial process into high-pressure steam through the evaporator, which drives the turbine to drive the generator to generate electricity; the low-pressure steam discharged by the turbine is condensed into liquid in the cooler, and the cooling medium is recycled after dissipating heat in the cooling tower; the working fluid pump returns the condensed working fluid to the evaporator to complete a cycle; in this way, through the close cooperation of various equipment, the system efficiently utilizes waste heat to generate electricity, realizing energy recycling and energy saving and consumption reduction, such as Figure 1 As shown. The magnetic levitation expansion generator has gradually become a typical active control component in the low-temperature waste heat power generation system due to its advantages such as small size, long life and high efficiency. However, the magnetic levitation expansion generator is highly dependent on the normal operation of the power supply module, control module and other modules in the low-temperature waste heat power generation system. When these modules fail, it will directly threaten the safety of equipment and personnel. However, in the existing solutions, when the system fails, the motor is directly shut down and the power supply is cut off, resulting in the failure information cannot be obtained in time, and maintenance personnel need to gradually troubleshoot the fault. Utility Model Content
[0003] In view of the above defects or improvement needs of the prior art, the utility model provides an integrated fault detection device for a magnetic levitation expansion generator, which aims to perform real-time fault detection on the magnetic levitation expansion generator in a low-temperature waste heat power generation system.
[0004] To achieve the above-mentioned purpose, according to the first aspect of the utility model, an integrated fault detection device for a magnetic levitation expansion generator is provided, wherein the magnetic levitation expansion generator is used in a low-temperature waste heat power generation system, and comprises: a housing, and various signal receiving ends and a signal processing central module arranged inside the housing; wherein the various signal receiving ends comprise a current sensor signal receiving end, a temperature sensor signal receiving end, two voltage sensor signal receiving ends, and a displacement sensor signal receiving end;
[0005] The current sensor signal receiving end is connected to the current sensor of the magnetic levitation expansion generator, and is used to receive the current signal of the magnetic bearing winding; the temperature sensor signal receiving end is connected to the temperature sensor of the magnetic levitation expansion generator, and is used to receive the magnetic axis temperature signal; the two voltage sensor signal receiving ends are respectively connected to the voltage sensors of the rectifier circuit and the buck circuit of the magnetic levitation expansion generator, and are used to receive the output voltage of the corresponding circuit; the displacement sensor signal receiving end is connected to the rotor displacement sensor in the magnetic levitation expansion generator, and is used to receive the displacement voltage signal on each degree of freedom of the rotor;
[0006] The signal processing central module is connected to each of the signal receiving ends and is used to output the fault status of the magnetic levitation expansion generator and accurate fault location information.
[0007] Furthermore, the signal processing central module outputs the fault status of the magnetic levitation expansion generator and accurate fault location information based on the current signal of the magnetic bearing winding received by the current sensor signal receiving end; the fault status includes whether the magnetic levitation expansion generator has a fault and the corresponding fault type.
[0008] Furthermore, the signal processing central module is also used to compare the magnetic axis temperature signal received by the temperature sensor signal receiving end with a preset temperature threshold. When the magnetic axis temperature signal exceeds the preset temperature threshold, it is determined that the magnetic levitation expansion generator is faulty and the corresponding fault type is output.
[0009] Furthermore, the signal processing central module determines whether a power supply module of the magnetic levitation expansion generator fails based on the output voltages of the rectifier circuit and the buck circuit received by the two voltage sensor signal receiving ends, and outputs a corresponding fault type.
[0010] Furthermore, the magnetic levitation expansion generator is a double-bridge motor with five degrees of freedom.
[0011] Furthermore, there are ten current sensor signal receiving terminals, and every two current sensor signal receiving terminals are respectively connected to the current sensors of the upper and lower bridge arms on one degree of freedom.
[0012] Furthermore, there are five displacement sensor signal receiving terminals, and each of the displacement sensor signal receiving terminals is connected to a displacement sensor on one degree of freedom.
[0013] Furthermore, it also includes a first common ground signal input terminal connected to the current sensor signal receiving terminal and the displacement sensor signal receiving terminal at the same time; a second common ground signal input terminal connected to the temperature sensor signal receiving terminal; and a third common ground signal input terminal connected to two voltage sensor signal receiving terminals.
[0014] Furthermore, it also includes a touch display module for real-time display of the signals received by each signal receiving end and the output of the signal processing central module.
[0015] Furthermore, it also includes a battery cover arranged on the shell, and the battery cover has a built-in battery for powering the signal receiving ends and the signal processing central module.
[0016] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects:
[0017] (1) The utility model is an integrated fault detection device for a magnetic levitation expansion generator in a low-temperature waste heat power generation system. By detecting the states of various signals during the stable operation of the magnetic levitation expansion generator, including the current signal of the magnetic bearing winding, the magnetic axis temperature signal, the output voltage signal of the rectifier circuit and the buck circuit, and the displacement voltage signal of each degree of freedom of the generator rotor, and inputting the corresponding signal into the signal processing central module, the fault state of the generator and the accurate positioning information of the fault can be output in real time. In this way, the real-time fault detection of the magnetic levitation expansion generator in the low-temperature waste heat power generation system is realized, and the time cost of system fault maintenance personnel for troubleshooting and detection is saved, the maintenance cost of the entire low-temperature waste heat power generation system is reduced, and the economic benefits are improved. At the same time, this integrated device is smaller in size.
[0018] (2) Furthermore, by displaying the data information transmitted by each sensor in real time through the touch display module, continuous monitoring of the low-temperature waste heat power generation system can be achieved, which is convenient for status detection and debugging of the magnetic levitation expander after a fault occurs, and at the same time provides data support for establishing a corresponding immediate fault-tolerant strategy after a fault occurs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural diagram of the low-temperature waste heat power generation system.
[0020] Figure 2 It is a schematic diagram of the structure of the integrated fault detection device in the embodiment of the utility model.
[0021] Figure 3 This is a flow chart of fault status detection performed by the signal processing central module in an embodiment of the utility model.
[0022] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:
[0023] 1-housing, 2-battery cover, 3-current sensor signal receiving end, 4-temperature sensor signal receiving end, 5, 8, 11-common ground signal input ends, 6, 7-voltage sensor signal receiving ends, 10-displacement sensor signal receiving end. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.
[0025] In the present invention, the terms "first", "second", etc. in the present invention and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0026] like Figure 2 and Figure 3 As shown, the magnetic levitation expansion generator in the embodiment of the utility model is used in a low-temperature waste heat power generation system, and the integrated fault detection device includes:
[0027] A housing 1 and a current sensor signal receiving terminal 3, a temperature sensor signal receiving terminal 4, two voltage sensor signal receiving terminals 6 and 7, a displacement sensor signal receiving terminal 10 and a signal processing central module arranged inside the housing 1;
[0028] Among them, the current sensor signal receiving terminal 3 is connected to the current sensor of the magnetic levitation expansion generator, and is used to receive the current signal of the magnetic bearing winding; in the embodiment of the utility model, the magnetic levitation expansion generator adopts a five-degree-of-freedom double-bridge motor, and there are ten current sensor signal receiving terminals 3, and every two current sensor signal receiving terminals 3 are respectively connected to the current sensors of the upper and lower bridge arms on one degree of freedom.
[0029] The temperature sensor signal receiving terminal 4 is connected to the temperature sensor of the magnetic suspension expansion generator and is used to receive the temperature signal of the motor magnetic shaft;
[0030] The two voltage sensor signal receiving terminals 6 and 7 are respectively connected to the voltage sensors of the rectifier circuit and the buck circuit of the magnetic levitation expansion generator, and are used to receive the output voltage of the rectifier circuit and the buck circuit; wherein the rectifier circuit is used to rectify the current in the external AC power grid into a DC current, and the buck circuit reduces the DC voltage of the rectifier output to a rated voltage value, and the two voltage sensors respectively sample the output voltage of the rectifier circuit and the buck circuit;
[0031] The displacement sensor signal receiving end 10 is connected to the rotor displacement sensor in the magnetic levitation expansion generator, and is used to receive the displacement voltage signal on each degree of freedom of the rotor of the magnetic levitation expansion generator; in the embodiment of the utility model, there are five displacement sensor signal receiving ends 10, and one displacement sensor signal receiving end 10 is connected to the displacement sensor on one degree of freedom; the rotor in the magnetic levitation expansion generator has five degrees of freedom in a three-dimensional space, including one axial movement degree of freedom and four radial movement degrees of freedom, and the five displacement sensors respectively sample the displacement voltage signals of the rotor on the five degrees of freedom.
[0032] The signal processing central module is used to output the fault status of the generator (including determining whether a fault has occurred and the type of fault) and accurate fault location information based on the signals from the signal receiving ends of each sensor. In the embodiment of the utility model, the signal processing central module adopts the existing integrated motor fault detection model to obtain the fault status of the generator and accurate fault location information based on the signals from the signal receiving ends of each sensor.
[0033] Specifically, the integrated motor fault detection model in the signal processing central module outputs the fault status of the generator and the precise location information of the fault based on the current signal of the magnetic bearing winding received by the current sensor signal receiving terminal 3.
[0034] Due to the mutual inductance of magnetic flux and current, the magnetic shaft heats up and the temperature will be higher than when not running. Therefore, the integrated motor fault detection model in the signal processing central module compares the motor magnetic shaft temperature signal received in real time by the temperature sensor signal receiving end 4 with the preset temperature threshold. When the magnetic shaft temperature exceeds the preset temperature threshold, the motor is judged to have a fault and the corresponding fault type is output.
[0035] The integrated motor fault detection model in the signal processing central module determines whether the power supply module of the magnetic levitation expansion generator fails based on the output voltages received by the two voltage sensor signal receiving terminals 6 and 7, and outputs the corresponding fault type.
[0036] The integrated fault detection device in the embodiment of the utility model also includes a common ground signal input terminal, and the common ground signal input terminal 5 is connected to the current sensor signal receiving terminal 3, the temperature sensor signal receiving terminal 4, two voltage sensor signal receiving terminals 6, 7 and the displacement sensor signal receiving terminal 10, which is used for grounding processing, thereby realizing electrostatic protection of sensitive components such as sensors and the entire detection device, reducing interference from stray signals, and improving the quality of sampling signals.
[0037] Preferably, there are three common ground signal input terminals, wherein the first common ground signal input terminal 5 is connected to the current sensor signal receiving terminal 3 and the displacement sensor signal receiving terminal 10 at the same time, the second common ground signal input terminal 8 is connected to the temperature sensor signal receiving terminal 4, and the third common ground signal input terminal 11 is connected to the two voltage sensor signal receiving terminals 6 and 7.
[0038] The integrated fault detection device in the embodiment of the utility model further includes a touch display module, which includes a touch display drive unit and a touch display screen, and is used for real-time visual display of the output of the signal processing central module. Specifically, the output signal of the signal processing central module is transmitted to the touch display drive unit, and the touch display screen receives the data information of the fault status and the precise location of the fault outputted by the touch display drive unit, and displays it visually.
[0039] It also includes the real-time display of the received signals of the real-time measurement data of each sensor. By real-time displaying the current signal of the magnetic bearing winding received by the current sensor signal receiving terminal 3, the real-time monitoring of the current condition of the magnetic bearing winding is realized; by real-time displaying the motor magnetic shaft temperature signal received by the temperature sensor signal receiving terminal 4, the real-time monitoring of the magnetic shaft temperature condition is realized; by real-time displaying the received signals of the two voltage sensor signal receiving terminals 6 and 7, the real-time monitoring of the power supply of the main circuit (rectifier circuit and buck circuit) is realized; by real-time displaying the received signals of the displacement sensor signal receiving terminal 10, the real-time monitoring of the state of the rotor in space is realized.
[0040] The integrated fault detection device in the embodiment of the utility model further includes a battery cover 2 arranged on the housing 1, and the battery cover 2 has a built-in battery for powering each sensor receiving end, a common ground signal input end, a signal processing central module and a touch display module.
[0041] As a specific implementation method, there are three groups of reserved connection points above the shell of the integrated fault detection device. The first group of ten connection points are connected to the current sensor signal receiving end inside the product, and are connected to the current sensor for detecting winding current in the magnetic levitation expansion generator through a wire outside the product; one connection point in the second group is connected to the temperature sensor signal receiving end inside the product, and is connected to the temperature sensor for detecting motor temperature in the magnetic levitation expansion generator through a wire outside the product; one connection point in the third group is connected to the ground wire. There are two groups of reserved connection points on the side of the product. The first group of three connection points, two of which are connected to the voltage sensor signal receiving end inside the product, and are connected to the voltage sensor in the rectifier and buck circuit in the magnetic levitation expansion generator through a wire outside the product, and another connection point is connected to the ground wire; the second group of six connection points, five of which are connected to the displacement sensor signal receiving end inside the product, and are connected to the displacement sensor for detecting rotor offset or rotation in the magnetic levitation expansion generator through a wire outside the product, and another connection point is connected to the ground wire. Inside the product, the current sensor signal receiving end, temperature sensor signal receiving end, voltage sensor signal receiving end and displacement sensor signal receiving end are respectively connected to the data processing central unit. After comprehensive processing, the received data is transmitted to the touch display driving unit. The touch display screen receives the fault status and fault precise location data information output by the touch display driving unit, and displays it visually.
[0042] The utility model is used for an integrated fault detection device for a magnetic levitation expansion generator in a low-temperature waste heat power generation system. By detecting the states of various signals during the stable operation of the magnetic levitation expansion generator, including the current signal of the magnetic bearing winding, the magnetic axis temperature signal, the output voltage signal of the rectifier circuit and the buck circuit, and the displacement voltage signal on each degree of freedom of the generator rotor, and inputting the corresponding signal into the signal processing central module, the fault state of the generator (including determining whether a fault has occurred and the type of fault) and the accurate positioning information of the fault can be output in real time. In this way, the magnetic levitation expansion generator in the low-temperature waste heat power generation system can be detected in real time, and the time cost of system fault maintenance personnel for troubleshooting and detection can be saved, the maintenance cost of the entire low-temperature waste heat power generation system can be reduced, and the economic benefits can be improved. At the same time, this integrated device is smaller in size.
[0043] By displaying the data information transmitted by each sensor in real time through the touch display module, continuous monitoring of the low-temperature waste heat power generation system can be achieved, which is convenient for status detection and debugging of the magnetic levitation expander after a failure occurs, and provides data support for establishing corresponding immediate fault-tolerant strategies after a failure occurs.
[0044] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An integrated fault detection device for a magnetic levitation expansion generator, the magnetic levitation expansion generator being used in a low-temperature waste heat power generation system, characterized in that: include: A housing (1) and signal receiving terminals and a signal processing central module arranged inside the housing (1); wherein the signal receiving terminals include a current sensor signal receiving terminal (3), a temperature sensor signal receiving terminal (4), two voltage sensor signal receiving terminals (6, 7) and a displacement sensor signal receiving terminal (10); The current sensor signal receiving end (3) is connected to the current sensor of the magnetic levitation expansion generator, and is used to receive the current signal of the magnetic bearing winding; the temperature sensor signal receiving end (4) is connected to the temperature sensor of the magnetic levitation expansion generator, and is used to receive the magnetic axis temperature signal; the two voltage sensor signal receiving ends (6, 7) are respectively connected to the voltage sensors of the rectifier circuit and the buck circuit of the magnetic levitation expansion generator, and are used to receive the output voltage of the corresponding circuit; the displacement sensor signal receiving end (10) is connected to the rotor displacement sensor in the magnetic levitation expansion generator, and is used to receive the displacement voltage signal of each degree of freedom of the rotor; The signal processing central module is connected to each of the signal receiving ends and is used to output the fault status of the magnetic levitation expansion generator and accurate fault location information.
2. The integrated fault detection device according to claim 1, characterized in that: The signal processing central module outputs the fault status of the magnetic levitation expansion generator and accurate fault location information based on the current signal of the magnetic bearing winding received by the current sensor signal receiving end (3); the fault status includes whether the magnetic levitation expansion generator has a fault and the corresponding fault type.
3. The integrated fault detection device according to claim 1, characterized in that: The signal processing central module is also used to compare the magnetic axis temperature signal received by the temperature sensor signal receiving end (4) with a preset temperature threshold value, and when the magnetic axis temperature signal exceeds the preset temperature threshold value, determine that the magnetic suspension expansion generator is faulty and output a corresponding fault type.
4. The integrated fault detection device according to claim 1, characterized in that: The signal processing central module determines whether a power supply module of the magnetic suspension expansion generator fails based on the output voltages of the rectifier circuit and the buck circuit received by the two voltage sensor signal receiving ends (6, 7), and outputs the corresponding fault type.
5. The integrated fault detection device according to any one of claims 1 to 4, characterized in that: The magnetic levitation expansion generator is a double-bridge motor with five degrees of freedom.
6. The integrated fault detection device according to claim 5, characterized in that: There are ten current sensor signal receiving terminals (3), and every two current sensor signal receiving terminals (3) are respectively connected to the current sensors of the upper and lower bridge arms on one degree of freedom.
7. The integrated fault detection device according to claim 5, characterized in that: There are five displacement sensor signal receiving terminals (10), and each of the displacement sensor signal receiving terminals (10) is connected to a displacement sensor on one degree of freedom.
8. The integrated fault detection device according to any one of claims 1 to 4, characterized in that: It also includes a first common ground signal input terminal (5) connected to the current sensor signal receiving terminal (3) and the displacement sensor signal receiving terminal (10) at the same time; a second common ground signal input terminal (8) connected to the temperature sensor signal receiving terminal (4); and a third common ground signal input terminal (11) connected to two voltage sensor signal receiving terminals (6, 7).
9. The integrated fault detection device according to any one of claims 1 to 4, characterized in that: It also includes a touch display module for real-time display of the signals received by each signal receiving end and the output of the signal processing central module.
10. The integrated fault detection device according to any one of claims 1 to 4, characterized in that: It also comprises a battery cover (2) arranged on the housing (1), wherein the battery cover (2) has a built-in battery for supplying power to each of the signal receiving ends and the signal processing central module.