Dust removal fan bearing dual redundancy online detection method

Abstract

The invention relates to a dust removal fan bearing dual-redundancy online detection method, and belongs to the field of automation. The method comprises the steps that a plurality of vibration detection devices and temperature detection devices are arranged at the light vehicle end and the heavy vehicle end of the dust removal fan correspondingly, and a first temperature detection device and a second temperature detection device are arranged on a bearing of the light vehicle end or the heavy vehicle end of the dust removal fan correspondingly; the vertical side of the bearing is provided with a first vertical vibration detection device and a second vertical vibration detection device, and the horizontal side of the bearing is provided with a first horizontal vibration detection device and a second horizontal vibration detection device. And the detection values of all the vibration detection devices and the temperature detection devices are compared with corresponding preset threshold values in the main control system, and when the two detection values of any same part reach the preset threshold values, the main control system sends an interlocking shutdown instruction.

Description

Technical Field

[0001] The invention belongs to the field of automation and relates to a dual-redundancy online detection method for a dust removal fan bearing. Background Art

[0002] At present, there are many dust removal equipments used in the steel industry, and the operation of dust removal equipment must be synchronized with the production equipment. As the key equipment in dust removal equipment, the dust removal fan is particularly important for stable operation. At present, with the characteristics of large-scale and integrated equipment in the steel industry, the fan installed tonnage is large, the cost is high, and the system control is more precise. The dust removal fan bearing (sliding or rolling bearing), as the main failure point of the fan, the bearing defect diagnosis and online detection technology are particularly critical, and also provide a basis for equipment cycle management. The fan absolute bearing vibration and temperature detection technology currently used can more accurately reflect the operating status of the fan bearing.

[0003] The current dust removal fan bearings are equipped with a set of online vibration and temperature detection devices to detect bearing vibration and temperature in real time to determine the internal operating status and deterioration trend of the bearing seat.

[0004] The vibration and temperature detection of the dust removal fan bearing are interlocked with the fan. If the vibration value exceeds the set threshold (alarm and shutdown), it can be displayed on the operation screen or the fan can be interlocked to shut down. However, the current single-set bearing detection system for online detection has low signal anti-interference performance and weak fault tolerance, and the interlock is implemented in the PLC control program. Once there is a problem with the vibration or temperature measurement circuit output, such as disconnection, interference, instrument damage, etc., the fan will be interlocked and shut down, and the fault handling time will be long, which seriously restricts production. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a dual redundant online detection method for dust removal fan bearings, redesign the hidden dangers and shortcomings of fan bearing online detection, add a set of online redundant detection methods, and optimize and improve the PLC program and WINCC screen to solve the environmental protection and production accidents caused by the fan's incorrect shutdown due to the failure of the fan bearing instrument loop.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A method for online detection of dual redundant bearings of a dust removal fan comprises: arranging a plurality of vibration detection devices and temperature detection devices at the light vehicle end and the heavy vehicle end of the dust removal fan, respectively, wherein a first temperature detection device and a second temperature detection device are respectively arranged on the bearings at the light vehicle end or the heavy vehicle end of the dust removal fan, a first vertical vibration detection device and a second vertical vibration detection device are respectively arranged on the vertical side of the bearing, and a first horizontal vibration detection device and a second horizontal vibration detection device are respectively arranged on the horizontal side of the bearing, the detection values ​​of all vibration detection devices and temperature detection devices are compared with corresponding preset thresholds in a main control system, and when the two detection values ​​at any same position reach the preset threshold, the main control system issues an interlocking shutdown command.

[0008] Furthermore, the vibration detection device includes four settings, namely the vertical side of the bearing at the light vehicle end, the horizontal side of the bearing at the light vehicle end, the vertical side of the bearing at the heavy vehicle end, and the horizontal side of the bearing at the heavy vehicle end. When any of the following situations occurs, it indicates that the vibration of the bearing is abnormal, and the main control system issues an interlocking shutdown command:

[0009] The detection values ​​of the first vertical vibration detection device and the second vertical vibration detection device on the vertical side of the bearing at the light vehicle end or the heavy vehicle end are respectively compared with the corresponding preset thresholds and both detection values ​​are greater than or equal to the preset thresholds;

[0010] The detection values ​​of the first horizontal vibration detection device and the second horizontal vibration detection device on the horizontal side of the bearing at the light vehicle end or the heavy vehicle end are respectively compared with the corresponding preset thresholds and both detection values ​​are greater than or equal to the preset thresholds.

[0011] Furthermore, the temperature detection device includes two installation locations, namely, the bearing at the light vehicle end and the bearing at the heavy vehicle end. Each location is provided with a first temperature detection device and a second temperature detection device. When any of the following situations occurs, it indicates that the temperature of the bearing is abnormal, and the main control system issues an interlocking shutdown command:

[0012] The detection values ​​of the first temperature detection device and the second temperature detection device at the bearing of the light vehicle end are respectively compared with the corresponding preset thresholds, and both detection values ​​are greater than or equal to the preset thresholds;

[0013] The detection values ​​of the first temperature detection device and the second temperature detection device at the bearing of the heavy vehicle end are respectively compared with the corresponding preset thresholds, and both detection values ​​are greater than or equal to the preset thresholds.

[0014] Furthermore, the vibration detection device includes a vibration sensor and a secondary table, and the temperature sensor includes a temperature sensor and a secondary table, wherein the secondary table is used to display data on site.

[0015] Furthermore, the method of the present invention selects WINCC program as the main control system, wherein the PLC main program is used as the main control system, and the fan control is realized through the PLC main program.

[0016] Furthermore, data from the vibration detection devices and temperature detection devices on the horizontal and vertical sides of the light vehicle end and the heavy vehicle end of the dust removal fan are connected to the main PLC control system, and a signal isolator is used on the access side to increase signal quality.

[0017] Furthermore, the WINCC screen window adds the function of setting the alarm and interlocking shutdown threshold for each detection point, and sets the authority management.

[0018] Furthermore, the WINCC screen adds the "release / activate" function of the interlock shutdown at each detection point, and sets up permission management.

[0019] The beneficial effects of the present invention are:

[0020] The redundant detection of the present invention substantially eliminates false alarms caused by failure of a single instrumentation and control loop.

[0021] The present invention performs filtering and delay processing on the comparative values ​​of the bearing temperature and vibration of the circuit in series with the interlocking shutdown of the dust removal fan, thereby improving the anti-interference capability of the system.

[0022] The vibration sensor + detector data acquisition mode adopted by the present invention has several advantages over the original integrated vibration transmitter: A. The sensor does not need power supply and is free of interference; B. When the sensor has an open circuit failure, the detector has self-diagnosis capability, and the remote data display is minimum, which will not cause the machine to trip; C. The transmission circuit and signal processing circuit in the integrated vibration transmitter are integrated inside the sensor, which is greatly affected by the environment, especially the temperature; D. It has on-site digital display and alarm functions, which is convenient for on-site equipment inspection. E. It has a filter setting function.

[0023] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 It is an information flow diagram of the online detection method of the present invention;

[0026] Figure 2It is a structural schematic diagram of a vibration detection device and a temperature detection device of the online detection method of the present invention. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] See also Figure 1-2 , which is a dual-redundancy online detection method for dust removal fan bearings.

[0031] The dual-redundancy online detection method for the dust removal fan bearing of the present invention comprises: arranging a plurality of vibration detection devices and temperature detection devices at the light vehicle end and the heavy vehicle end of the dust removal fan respectively, wherein, Figure 1As shown, a first temperature detection device and a second temperature detection device are respectively provided on the bearings at the light vehicle end or the heavy vehicle end of the dust removal fan, a first vertical vibration detection device and a second vertical vibration detection device are respectively provided on the vertical side of the bearing, and a first horizontal vibration detection device and a second horizontal vibration detection device are respectively provided on the horizontal side of the bearing. The detection values ​​of all vibration detection devices and temperature detection devices are compared with corresponding preset thresholds in the main control system, wherein, when both detection values ​​at the same position reach the preset threshold, the main control system issues an interlocking shutdown command.

[0032] like Figure 2 As shown, the vibration detection device includes four setting positions, namely the vertical side of the bearing at the light vehicle end, the horizontal side of the bearing at the light vehicle end, the vertical side of the bearing at the heavy vehicle end, and the horizontal side of the bearing at the heavy vehicle end. Two vibration sensors are set at each position, with a total of 8 detection points.

[0033] When any of the following situations occurs, it means that the vibration of the bearing is abnormal and the main control system issues an interlock shutdown command:

[0034] The detection values ​​of the first vertical vibration detection device and the second vertical vibration detection device on the vertical side of the bearing at the light vehicle end are respectively compared with the corresponding preset thresholds and both detection values ​​are greater than or equal to the preset thresholds;

[0035] The detection values ​​of the first vertical vibration detection device and the second vertical vibration detection device on the vertical side of the bearing at the heavy vehicle end are respectively compared with the corresponding preset thresholds and both detection values ​​are greater than or equal to the preset thresholds;

[0036] The detection values ​​of the first horizontal vibration detection device and the second horizontal vibration detection device on the horizontal side of the bearing at the light vehicle end are respectively compared with the corresponding preset thresholds and both detection values ​​are greater than or equal to the preset thresholds;

[0037] The detection values ​​of the first horizontal vibration detection device and the second horizontal vibration detection device on the horizontal side of the bearing at the heavy vehicle end are respectively compared with the corresponding preset thresholds and both detection values ​​are greater than or equal to the preset thresholds.

[0038] like Figure 2 As shown, the temperature detection device includes two installation locations, namely, the bearing at the light vehicle end and the bearing at the heavy vehicle end. Each location is provided with a first temperature detection device and a second temperature detection device, for a total of 4 detection points.

[0039] When any of the following situations occurs, it indicates that the bearing temperature is abnormal and the main control system issues an interlock shutdown command:

[0040] The detection values ​​of the first temperature detection device and the second temperature detection device at the bearing of the light vehicle end are respectively compared with the corresponding preset thresholds, and both detection values ​​are greater than or equal to the preset thresholds;

[0041] The detection values ​​of the first temperature detection device and the second temperature detection device at the bearing of the heavy vehicle end are respectively compared with the corresponding preset thresholds, and both detection values ​​are greater than or equal to the preset thresholds.

[0042] Example

[0043] Preferably, a set of vibration and temperature detection devices (including vibration probes, secondary meters, etc.) are added to the horizontal and vertical sides of the light vehicle and heavy vehicle ends of the dust removal fan, and the data is connected to the main PLC control system, and the secondary meter realizes local data display. After the transformation, each dust removal fan has a total of 8 vibration and temperature detection points.

[0044] Preferably, this embodiment selects WINCC program as the main control system of the method of the present invention, wherein the PLC main program is used as the main control system, and the fan control is realized through the PLC main program. Specifically as follows: a. The vibration data and temperature data of the vibration detection device and the temperature detection device are connected to the main control system, and a signal isolator is used on the access side to increase the signal quality and avoid interference; b. Taking the vibration of the light vehicle end of the fan as an example, the two sets of vibration measurement circuits are operated separately, and the data are "or" operated in the PLC program. When the two values ​​reach the threshold at the same time, an alarm or interlock shutdown is triggered. Similar logical control is performed on the vertical and horizontal temperature and vibration measurement of the light vehicle end of the fan, and the vertical and horizontal temperature and vibration measurement of the heavy vehicle end.

[0045] Preferably, the WINCC screen window is provided with the function of setting the alarm and interlocking shutdown threshold for each detection point, and authority management is provided to facilitate the adjustment of the threshold.

[0046] Preferably, the WINCC screen adds the "release / activate" function of the interlock shutdown at each detection point, and sets the authority management. If it is determined that the detection instrument or line is faulty, it can be quickly switched, the system can be quickly started to resume production, and the fault can be handled online, eliminating the phenomenon of long-term shutdown for fault handling.

[0047] Preferably, the real-time detection calculation value of the dust removal fan bearing is serially inserted into the fan control program. When the two detection values ​​at the same position reach the set threshold, a shutdown command is issued and an interlock shutdown is performed.

[0048] Compared with the existing technology, it has the following advantages:

[0049] 1) Redundant detection basically eliminates false alarms caused by single instrumentation and control loop failures;

[0050] 2) The comparative values ​​of bearing temperature and vibration in the circuit of dust removal fan interlock shutdown are filtered and delayed to improve the anti-interference ability of the system;

[0051] 3) The vibration sensor + detector data acquisition mode adopted has several advantages over the original integrated vibration transmitter: A. The sensor does not need power supply and is free of interference; B. When the sensor has an open circuit fault, the detector has self-diagnosis capability, and the remote data display is minimum, which will not cause the machine to trip; C. The transmission circuit and signal processing circuit in the integrated vibration transmitter are integrated inside the sensor, which is greatly affected by the environment, especially the temperature; D. It has on-site digital display and alarm functions, which is convenient for on-site equipment inspection. E. It has filter setting function.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A method for online detection of dual-redundancy of dust removal fan bearings, characterized in that: It includes: Several vibration detection devices and temperature detection devices are respectively arranged at the light vehicle end and the heavy vehicle end of the dust removal fan. A first temperature detection device and a second temperature detection device are respectively arranged on the bearings at the light vehicle end or the heavy vehicle end of the dust removal fan, a first vertical vibration detection device and a second vertical vibration detection device are respectively arranged on the vertical side of the bearing, and a first horizontal vibration detection device and a second horizontal vibration detection device are respectively arranged on the horizontal side of the bearing. The detection values ​​of all vibration detection devices and temperature detection devices are compared with corresponding preset thresholds in the main control system. When both detection values ​​at the same part reach the preset threshold, the main control system issues an interlocking shutdown command.

2. A method for online detection of dual-redundancy of dust removal fan bearings according to claim 1, characterized in that: The vibration detection device includes four installation positions, namely the vertical side of the bearing at the light vehicle end, the horizontal side of the bearing at the light vehicle end, the vertical side of the bearing at the heavy vehicle end, and the horizontal side of the bearing at the heavy vehicle end. When any of the following situations occurs, it means that the vibration of the bearing is abnormal and the main control system issues an interlock shutdown command: The detection values ​​of the first vertical vibration detection device and the second vertical vibration detection device on the vertical side of the bearing at the light vehicle end or the heavy vehicle end are respectively compared with the corresponding preset thresholds and both detection values ​​are greater than or equal to the preset thresholds; The detection values ​​of the first horizontal vibration detection device and the second horizontal vibration detection device on the horizontal side of the bearing at the light vehicle end or the heavy vehicle end are respectively compared with the corresponding preset thresholds and both detection values ​​are greater than or equal to the preset thresholds.

3. A method for online detection of dual-redundancy of dust removal fan bearings according to claim 1, characterized in that: As for the temperature detection device, it includes two installation locations, namely, on the bearing of the light vehicle end and on the bearing of the heavy vehicle end, and each location is provided with a first temperature detection device and a second temperature detection device; When any of the following situations occurs, it indicates that the bearing temperature is abnormal and the main control system issues an interlock shutdown command: The detection values ​​of the first temperature detection device and the second temperature detection device at the bearing of the light vehicle end are respectively compared with the corresponding preset thresholds, and both detection values ​​are greater than or equal to the preset thresholds; The detection values ​​of the first temperature detection device and the second temperature detection device at the bearing of the heavy vehicle end are respectively compared with the corresponding preset thresholds, and both detection values ​​are greater than or equal to the preset thresholds.

4. A method for online detection of dual-redundancy of dust removal fan bearings according to claim 1, characterized in that: The vibration detection device includes a vibration sensor and a secondary meter, and the temperature sensor includes a temperature sensor and a secondary meter, wherein the secondary meter is used for displaying data on site.

5. The method for online detection of dual-redundancy of dust removal fan bearings according to claim 1 is characterized in that: The method selects WINCC program as the main control system, wherein a PLC main program is used as the main control system, and the fan control is realized through the PLC main program.

6. A method for online detection of dual-redundancy of dust removal fan bearings according to claim 5, characterized in that: The data of the vibration detection devices and temperature detection devices on the horizontal and vertical sides of the light vehicle end and the heavy vehicle end of the dust removal fan are connected to the main PLC control system, and a signal isolator is used on the access side to increase the signal quality.

7. A method for online detection of dual-redundancy of dust removal fan bearings according to claim 5, characterized in that: Add alarm and interlock shutdown threshold setting functions for each detection point in the WINCC screen window, and set permission management.

8. A method for online detection of dual-redundancy of dust removal fan bearings according to claim 5, characterized in that: The WINCC screen adds the "release / activate" function for the interlock shutdown of each detection point, and sets the authority management.

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