CN217739760U - Predictive protection device for induced draft fan - Google Patents
Predictive protection device for induced draft fan Download PDFInfo
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- CN217739760U CN217739760U CN202221744079.5U CN202221744079U CN217739760U CN 217739760 U CN217739760 U CN 217739760U CN 202221744079 U CN202221744079 U CN 202221744079U CN 217739760 U CN217739760 U CN 217739760U
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Abstract
The utility model discloses a predictive protection device for a draught fan, which relates to the field of draught fan safe operation monitoring, and comprises a data acquisition unit and a control unit, wherein the control unit comprises a state monitoring module, an analog input module and a CPU module, and the state monitoring module and the analog input module are respectively connected with the CPU module; the data acquisition unit comprises an acceleration sensor and a speed sensor, the acceleration sensor is used for acquiring acceleration data of a driving end and a non-driving end of the induced draft fan, the speed sensor is used for detecting the rotating speed of the induced draft fan, and the acceleration sensor and the speed sensor are respectively connected with the state monitoring module. The utility model discloses gather the vibration data of draught fan drive end and non-drive end, calculate through the control unit and analyze out different eigenvalues to judge draught fan trouble type according to the eigenvalue, improve draught fan failure prediction's accuracy.
Description
Technical Field
The utility model relates to a draught fan safe operation monitoring field especially relates to a draught fan predictive protection device.
Background
The induced draft fan as a large-scale rotating device has many external factors such as strong continuity and bad operation environment, and is easy to cause gradual damage of partial components (such as a bearing and a main shaft), and if the states of the components are not found in time and correct maintenance treatment is carried out in the early stage, serious consequences can be caused, so that safe and reliable operation of the induced draft fan plays a vital role in production.
The prior art discloses a fault diagnosis device for an induced draft fan, which comprises a signal conditioner, a data acquisition card, a data processing server, four piezoelectric acceleration sensors arranged on a bearing of the induced draft fan, two piezoelectric acceleration sensors arranged on a bearing of a motor of the induced draft fan, and two eddy current displacement sensors arranged on a rotating shaft of the induced draft fan. Although the scheme can analyze and diagnose the faults of the induced draft fan to a certain extent, a plurality of sensors are only installed at the driving end of the induced draft fan, and the fault types of the induced draft fan are more, so that the situation that partial fault types cannot be identified possibly exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a draught fan predictive protection device, gather the vibration data of draught fan drive end and non-drive end, calculate through the control unit and analyze out different eigenvalues to judge draught fan trouble type according to the eigenvalue, improve the accuracy of draught fan trouble prediction.
In order to achieve the above purpose, the present invention is realized by the following technical solution:
the embodiment of the utility model provides a draught fan predictive protection device, including data acquisition unit and the control unit, the control unit includes state monitoring module, analog input module and CPU module, and state monitoring module, analog input module connect the CPU module respectively; the data acquisition unit comprises an acceleration sensor and a speed sensor, the acceleration sensor is used for acquiring acceleration data of a driving end and a non-driving end of the induced draft fan, the speed sensor is used for detecting the rotating speed of the induced draft fan, and the acceleration sensor and the speed sensor are respectively connected with the state monitoring module.
As a further implementation mode, the speed sensor adopts an inductive proximity switch and is installed on a bearing of an induced draft fan.
As a further implementation mode, the analog quantity input module is connected with a temperature transmitter and a pressure transmitter.
As a further implementation mode, the output end of the control unit is connected with an audible and visual alarm.
As a further implementation manner, the output end of the control unit is connected with the internet of things gateway, and is used for uploading data to the cloud platform.
As a further implementation mode, the output end of the control unit is connected with a human-computer interaction module and used for displaying data.
As a further implementation manner, the state monitoring module is provided with a plurality of acceleration sensor input channels and a speed sensor input channel;
the state monitoring module is connected with the CPU module through a backboard bus interface.
As a further implementation, the status monitoring module is configured with a memory.
As a further implementation mode, the CPU module is integrated with a plurality of channels of input and output digital quantity, and is connected with the state monitoring module and the analog quantity input module through a backboard bus.
As a further implementation mode, the acceleration sensor adopts an MEMS sensor based on capacitance measurement, and the driving end and the non-driving end of the induced draft fan are both provided with the acceleration sensor.
The utility model has the advantages as follows:
(1) The utility model discloses an acceleration sensor gathers the vibration data of draught fan drive end and non-drive end simultaneously, goes out different eigenvalues through the control unit calculation analysis to judge out the common mechanical fault type of draught fan according to the eigenvalue, improve the accuracy of draught fan failure prediction.
(2) The utility model discloses analog signal such as bearing temperature, lubricating oil pressure, baffle regulating gate aperture of draught fan send to the control unit, and the control unit combines the fault type to judge whether trigger protection tripping operation mechanism, carries out the early warning before the equipment trouble according to the change of characteristic value to avoid equipment sudden failure to cause great loss.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to constitute a limitation on the invention.
Fig. 1 is a schematic structural diagram of the present invention according to one or more embodiments;
fig. 2 (a) and 2 (b) are schematic state monitoring module wiring diagrams in accordance with one or more embodiments of the present disclosure;
fig. 3 (a) and 3 (b) are schematic diagrams of drive end station locations according to one or more embodiments of the present disclosure;
figure 4 is a schematic diagram of non-drive end station locations according to one or more embodiments of the present disclosure.
The device comprises an acceleration sensor 1 and a speed sensor 2.
Detailed Description
The first embodiment is as follows:
the embodiment provides a predictive protection device for an induced draft fan, which comprises a data acquisition unit and a control unit, wherein the control unit comprises a state monitoring module, an analog input module and a CPU module, and the state monitoring module and the analog input module are respectively connected with the CPU module.
The data acquisition unit comprises an acceleration sensor 1 and a speed sensor 2, and as shown in fig. 3 (a) and 4, the acceleration sensor 1 is installed at the driving end and the non-driving end and is used for acquiring acceleration data of the driving end and the non-driving end of the induced draft fan; as shown in fig. 3 (b), speed sensor 2 is installed at the drive end for detecting the rotational speed of the induced draft fan, and acceleration sensor 1 and speed sensor 2 are connected with the state monitoring module respectively.
In this embodiment, as shown in fig. 2 (a) and 2 (b), the chip model of the state monitoring module is siemens SM1281, and is connected to the acceleration sensor through a signal line for data preprocessing.
The analog input module is connected with a temperature transmitter and a pressure transmitter, and is provided with a Siemens SM1231 chip model for acquiring parameters such as the bearing temperature of the induced draft fan, the lubricating oil pressure, the opening degree of the baffle plate adjusting valve and the like.
The chip model of the CPU module is Siemens S7-1200 series 1214C, fourteen input and ten output digital quantity channels are integrated, the CPU module is connected with the state monitoring module and the analog quantity input module through a backboard bus, the vibration acceleration data and the analog quantity data are finally analyzed and processed, the current running state of the equipment is diagnosed, and the CPU module is internally provided with protection logic to judge whether a protection mechanism is triggered.
It is understood that in other embodiments, the state monitoring module, the analog input module, and the CPU module may also select other types of chips.
Furthermore, the acceleration sensor adopts an MEMS sensor based on capacitance measurement, is arranged at the driving end and the non-driving end of the induced draft fan and is used for acquiring vibration acceleration data of equipment.
The speed sensor adopts an inductive proximity switch and is arranged on a bearing of the induced draft fan, so that the rotating speed of the induced draft fan can be accurately measured.
The output end of the control unit of the embodiment is further connected with an audible and visual alarm, an internet of things gateway and a human-computer interaction module, and the human-computer interaction module is used for presenting an analysis diagnosis result and a protection mechanism running state and performing operation confirmation and protection logic modification through an operation interface.
The internet of things gateway adopts an industrial internet of things gateway and is used for uploading data to a cloud platform, and the data can be remotely transmitted to a command center through a network, so that the functions of remote monitoring and fault processing of a mobile phone or a PC (personal computer) are realized. The audible and visual alarm is used for reminding the early warning information and the alarm information.
The working principle of the embodiment is as follows:
acquiring vibration acceleration original data of the induced draft fan through a state monitoring module; the analog input module acquires parameters such as the temperature of a bearing of the induced draft fan, the pressure of lubricating oil, the opening of a baffle adjusting valve and the like; the CPU module collects the running state of the induced draft fan and the running states of various valves and components of the induced draft fan through an integrated digital channel.
The state monitoring module carries out filtering, transformation and calculation on the vibration acceleration data, and obtains an RMS (root mean square) characteristic value of the induced draft fan within a certain time range by combining parameters such as speed, specification and model of a bearing and the like; the CPU module acquires the related data through a back panel bus, thereby realizing the early warning of the state of the induced draft fan and triggering a protection tripping mechanism when the fault is serious.
The man-machine interaction module presents the analysis and diagnosis result and the protection mechanism running state, and an operator can confirm the operation and modify the protection logic.
In this embodiment, adopt MEMS sensor to gather the vibration data of draught fan drive end and non-drive end simultaneously, calculate through the control unit and analyze out different eigenvalues to judge out the common mechanical fault type of draught fan if according to the eigenvalue: eccentricity, resonance, shaft bending, imbalance, bearing wear, misalignment, looseness, etc.
Analog quantity signals such as bearing temperature, lubricating oil pressure and the opening of a baffle adjusting door of the induced draft fan are acquired to the control unit for processing and logical judgment, and whether a protection tripping mechanism is triggered or not is judged by combining diagnosed fault types. The control unit can carry out early warning before equipment failure according to the change of the characteristic value, so that the major loss caused by sudden failure of the equipment is avoided. Meanwhile, the control unit is internally integrated with the startup sequence and conditions of the induced draft fan, so that the correct startup sequence and conditions of the induced draft fan are ensured to be met, and accidents caused by no startup conditions or misoperation are avoided.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The predictive protection device for the induced draft fan is characterized by comprising a data acquisition unit and a control unit, wherein the control unit comprises a state monitoring module, an analog input module and a CPU module, and the state monitoring module and the analog input module are respectively connected with the CPU module; the data acquisition unit comprises an acceleration sensor and a speed sensor, the acceleration sensor is used for acquiring acceleration data of a driving end and a non-driving end of the draught fan, the speed sensor is used for detecting the rotating speed of the draught fan, and the acceleration sensor and the speed sensor are respectively connected with the state monitoring module.
2. The predictive protection device for an induced draft fan according to claim 1, wherein said speed sensor is an inductive proximity switch mounted on a bearing of the induced draft fan.
3. The predictive protector for an induced draft fan according to claim 1, wherein said analog input module is connected to a temperature transmitter and a pressure transmitter.
4. The predictive protection device for an induced draft fan according to claim 1, wherein an audible and visual alarm is connected to an output end of the control unit.
5. The predictive protection device for the induced draft fan according to claim 1, wherein an output end of the control unit is connected with an internet of things gateway for uploading data to a cloud platform.
6. The predictive protection device for an induced draft fan according to claim 1, wherein an output terminal of said control unit is connected to a human-computer interaction module for displaying data.
7. The predictive protection device for an induced draft fan according to claim 1, wherein said condition monitoring module is provided with a plurality of acceleration sensor input channels and a speed sensor input channel;
the state monitoring module is connected with the CPU module through a backboard bus interface.
8. The predictive protection device for an induced draft fan according to claim 7, wherein said condition monitoring module is configured with a memory.
9. The predictive protection device for the induced draft fan according to claim 1, wherein the CPU module is integrated with a plurality of input and output digital channels, and is connected with the state monitoring module and the analog input module through a backplane bus.
10. The predictive protection device for an induced draft fan according to claim 1, wherein said acceleration sensor is a MEMS sensor based on capacitance measurement, and both the driving end and the non-driving end of the induced draft fan are installed with acceleration sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221744079.5U CN217739760U (en) | 2022-07-07 | 2022-07-07 | Predictive protection device for induced draft fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221744079.5U CN217739760U (en) | 2022-07-07 | 2022-07-07 | Predictive protection device for induced draft fan |
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| Publication Number | Publication Date |
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| CN217739760U true CN217739760U (en) | 2022-11-04 |
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| CN202221744079.5U Active CN217739760U (en) | 2022-07-07 | 2022-07-07 | Predictive protection device for induced draft fan |
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2022
- 2022-07-07 CN CN202221744079.5U patent/CN217739760U/en active Active
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