A fan operation state detection device

Abstract

The utility model discloses a fan operation state detection device relates to fan operation state monitoring technical field, include: detection casing, baffle mechanism, stop piece and signal acquisition mechanism, and detection casing has the air inlet end and the air outlet end of opposite setting, and the air inlet end is used for with fan can dismantle fixedly connected, baffle mechanism includes baffle and pivot, and pivot is installed in the air outlet end and is connected with the air outlet end rotation, and baffle is fixedly connected with pivot and is matched with the air outlet, in the process of fan normal work, the air pressure of air duct can push baffle and rotate to design angle, one end of stop piece is fixedly connected with detection casing, and the other end is used for with baffle contact to limit the limit rotation angle of baffle, signal acquisition mechanism is installed on detection casing, and signal acquisition mechanism includes non -contact displacement sensor and signal processing circuit to detect baffle deflection displacement and output multistage signal, simple structure, convenient to use, effective cost saving, effectively improve detection effect.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine operation status monitoring technology, and in particular to a wind turbine operation status detection device. Background Technology

[0002] In industrial production, the normal operation of wind turbines directly affects the stability of the entire system. Currently, wind turbine status monitoring mainly relies on electronic sensors (such as pressure sensors and flow meters) and auxiliary detection using power circuit breakers. However, these methods have significant drawbacks, such as high cost and complex installation. Furthermore, when a wind turbine experiences bearing jamming, the power circuit breaker may fail, making it impossible to accurately and promptly reflect the wind turbine's operating status.

[0003] The detection methods proposed in existing related patents also have some shortcomings. For example, the wind speed detection switch in patent CN102033139A, which uses a spring contacting a probe, has sensitivity that is difficult to meet practical needs; while patent CN211975480U detects wind pressure through the deformation of a circular cloth, but its durability is poor. Utility Model Content

[0004] The purpose of this invention is to provide a fan operation status detection device to solve the problems existing in the prior art. It has a simple structure, is easy to use, effectively saves costs, and effectively improves the detection effect.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a fan operation status detection device, comprising: a detection housing, a baffle mechanism, a limiting component, and a signal acquisition mechanism. The detection housing has an air inlet and an air outlet arranged opposite to each other. The air inlet is provided with an air inlet, and the air outlet is provided with an air outlet. The air outlet and the air inlet are connected within the detection housing to form a through air duct. The air inlet is used for detachably fixed connection to the fan. The baffle mechanism includes a baffle and a rotating shaft. The rotating shaft is installed on the air outlet and rotatably connected to the air outlet. The baffle is fixedly connected to the rotating shaft and matches the air outlet. During normal operation of the fan, the air pressure generated by the air duct can push the baffle to rotate to a designed angle. One end of the limiting component is fixedly connected to the detection housing, and the other end is used to contact the baffle to limit the extreme rotation angle of the baffle. The signal acquisition mechanism is installed on the detection housing and includes a non-contact displacement sensor and a signal processing circuit to detect the baffle deflection displacement and output multi-level signals.

[0007] Preferably, the baffle mechanism further includes a counterweight block, which is disposed on the baffle so that when the air duct is in a windless state, the baffle closes the air outlet under the action of the weight of the counterweight block.

[0008] Preferably, the baffle mechanism further includes a first magnetic block and a second magnetic block. The first magnetic block is fixedly connected to the side of the rotating shaft away from the baffle, and the second magnetic block is fixedly connected to the outer wall of the detection housing. The first magnetic block and the second magnetic block are arranged facing each other on the same side of their magnetic poles, so that the baffle closes the air outlet when the air duct is in a windless state.

[0009] Preferably, the baffle is provided with a sealing strip at the position where it contacts the air outlet.

[0010] Preferably, the detection housing is made of PVC material and the baffle is made of PVC board.

[0011] Preferably, the signal acquisition mechanism further includes a metal sheet, the non-contact displacement sensor is an inductive proximity switch, the metal sheet is disposed at the end of the baffle away from the rotating shaft, and the inductive proximity switch is correspondingly disposed on the outer wall of the detection housing.

[0012] Preferably, the device also includes a cable, one end of which is electrically connected to the signal processing circuit and the other end of which is electrically connected to an external control system or display device.

[0013] Preferably, the limiting member is a mechanical stop.

[0014] Preferably, the open end of the detection housing is provided with a strap groove.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] This invention provides a fan operation status detection device. The device can be easily connected to a fan and flexibly applied to different fan equipment. The through-flow duct ensures that the airflow generated by the fan can smoothly pass through the detection device, providing a foundation for subsequent operation status detection using the airflow's effect on a baffle. The detachable connection facilitates installation, disassembly, and maintenance. The baffle matches the air outlet, accurately sensing changes in air pressure within the duct. The air pressure generated during normal fan operation pushes the baffle to a designed angle, allowing the rotation angle to directly reflect the fan's air pressure and thus determine its operating status. This provides a crucial physical sensing element for fan operation status detection. The limiting component ensures the baffle rotation angle remains within a reasonable range, preventing damage or inaccurate detection due to excessive rotation caused by excessive air pressure or other abnormal conditions, thus enhancing the device's stability and reliability. The non-contact displacement sensor avoids mechanical wear, extending the service life of the signal acquisition mechanism. Outputting multi-level signals (such as digital and analog signals) can meet the diverse needs of different control systems, better integrate with various monitoring and control systems, broaden the applicability of the device, and improve its practicality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the fan operation status detection device provided by this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the open state structure;

[0020] Figure 3 Installation and application diagram of the fan operation status detection device provided by this utility model;

[0021] Figure 4 Installation and application diagram of the fan operation status detection device provided by this utility model;

[0022] In the diagram: 1. Signal acquisition mechanism; 2. Cable; 3. Metal sheet; 4. Baffle; 5. First magnetic block; 6. Rotating shaft; 7. Mechanical stop; 8. Detection housing; 9. Binding strap groove; 10. Fan operation status detection device; 11. Fan. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The purpose of this invention is to provide a fan operation status detection device to solve the problems existing in the prior art. It has a simple structure, is easy to use, effectively saves costs, and effectively improves the detection effect.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] This utility model provides a fan operating status detection device 10, such as Figures 1-4As shown, the device includes: a detection housing 8, a baffle mechanism, a limiting member, and a signal acquisition mechanism 1. The detection housing 8 has an air inlet and an air outlet arranged opposite to each other. The air inlet is provided with an air inlet, and the air outlet is provided with an air outlet. The air outlet and the air inlet are connected inside the detection housing 8 to form a through air duct. The air inlet is used to be detachably fixedly connected to the fan 11. The baffle mechanism includes a baffle 4 and a rotating shaft 6. The rotating shaft 6 is installed at the air outlet and rotatably connected to the air outlet. The baffle 4 is fixedly connected to the rotating shaft 6 and matches the air outlet so that the air pressure generated by the air duct can push the baffle 4 to rotate to the designed angle during the normal operation of the fan 11. One end of the limiting member is fixedly connected to the detection housing 8, and the other end is used to contact the baffle 4 to limit the extreme rotation angle of the baffle 4. The signal acquisition mechanism 1 is installed on the detection housing 8. The signal acquisition mechanism 1 includes a non-contact displacement sensor and a signal processing circuit to detect the deflection displacement of the baffle 4 and output multi-level signals. The detection device can be easily connected to the fan 11 and can be flexibly applied to different fan 11 devices. The through-flow duct ensures that the airflow generated by the fan 11 can smoothly pass through the detection device, providing a foundation for subsequent operational status detection using the airflow's effect on the baffle 4. The detachable connection facilitates the installation, disassembly, and maintenance of the device. The baffle 4 matches the air outlet, accurately sensing changes in air pressure within the duct. The air pressure generated during normal operation of the fan 11 can push the baffle 4 to rotate to a designed angle, allowing the rotation angle of the baffle 4 to directly reflect the air pressure of the fan 11, thus determining the fan 11's operational status and providing a crucial physical sensing element for detecting the fan 11's operational status. The limiting component ensures that the rotation angle of the baffle 4 is within a reasonable range, preventing damage or impact on detection accuracy due to excessive rotation caused by excessive air pressure or other abnormal conditions, thus enhancing the stability and reliability of the device. The non-contact displacement sensor avoids mechanical wear, extending the service life of the signal acquisition mechanism 1. Outputting multi-level signals (such as digital and analog signals) can meet the diverse needs of different control systems, better integrate with various monitoring and control systems, broaden the applicability of the device, and improve its practicality.

[0027] In a preferred embodiment, the baffle mechanism further includes a counterweight block disposed on the baffle 4 so that when the air duct is in a windless state, the baffle 4 closes the air outlet under the action of the weight of the counterweight block. The presence of the counterweight block enables the baffle 4 to automatically reset and close the air outlet when there is no wind, ensuring the stability of the initial state of the device when the fan 11 is not running or the air pressure is insufficient. This provides a reliable reference state for accurately detecting the air pressure changes of the fan 11 under different operating states, and improves the accuracy and stability of the detection.

[0028] In a preferred embodiment, the baffle mechanism further includes a first magnetic block 5 and a second magnetic block. The first magnetic block 5 is fixedly connected to the side of the rotating shaft 6 away from the baffle 4, and the second magnetic block is fixedly connected to the outer wall of the detection housing 8. The sides of the first magnetic block 5 and the second magnetic block with the same magnetic poles are arranged facing each other, so that the baffle 4 closes the air outlet when the air duct is in a windless state. Utilizing the principle of repulsion between like magnetic poles, the baffle 4 automatically closes the air outlet in a windless state. Compared with a counterweight, this method, while ensuring the stability of the initial closed state, may have better anti-interference capabilities and further enriches the technical means of realizing the windless reset of the baffle 4, providing more options for different application scenarios and needs.

[0029] In a preferred embodiment, a sealing strip is provided at the position of the baffle 4 where it contacts the air outlet. The sealing strip effectively improves the airtightness when the baffle 4 and the air outlet are closed, reduces airflow leakage, and enables the device to more accurately sense changes in wind pressure, thereby enhancing the sensitivity of wind pressure detection and improving the accuracy of judging the operating status of the fan 11.

[0030] In a preferred embodiment, the detection housing 8 is made of PVC, the baffle 4 is made of PVC board, the detection housing 8 is a PVC cylinder with a diameter of 25mm, the baffle 4 is made of 1mm thick PVC board, and the counterweight 5 is a PVC block (approximately 5g). PVC material has advantages such as low cost, light weight, and easy processing. Using PVC material to make the detection housing 8 and baffle 4 can reduce the cost and weight of the device, while meeting the basic requirements of structural strength and stability, thus improving the cost-effectiveness of the device.

[0031] In a preferred embodiment, the signal acquisition mechanism 1 further includes a metal sheet 3. The non-contact displacement sensor is an inductive proximity switch. The metal sheet 3 is disposed at the end of the baffle 4 away from the rotating shaft 6, and the inductive proximity switch is correspondingly disposed on the outer wall of the detection housing 8. The cooperation between the inductive proximity switch and the metal sheet 3 can accurately detect the displacement of the baffle 4. The non-contact detection method not only avoids mechanical wear but also has high sensitivity and reliability. This arrangement makes signal acquisition more accurate and can reflect the deflection displacement of the baffle 4 more promptly and accurately, thereby providing accurate data support for judging the operating status of the fan 11.

[0032] In a preferred embodiment, the non-contact displacement sensor is a Hall sensor.

[0033] In a preferred embodiment, a cable 2 is also included. One end of the cable 2 is electrically connected to the signal processing circuit, and the other end is electrically connected to an external control system or display device. The cable 2 enables the signal acquisition mechanism 1 to be connected to the external control system or display device, and can transmit the signals acquired by the detection device so that operators can monitor, analyze and control the operating status of the fan 11 through the external system. This greatly improves the functionality and practicality of the device and meets the remote monitoring and management needs in actual industrial production.

[0034] In a preferred embodiment, the limiting component is a mechanical stop 7. The mechanical stop 7 has a simple and reliable structure, which can intuitively and effectively limit the extreme rotation angle of the baffle 4. It is not prone to failure in practical applications, has good stability and durability, and can ensure that the baffle 4 rotates within the set angle range for a long time, providing a reliable guarantee for the detection of the operating status of the fan 11.

[0035] In a preferred embodiment, the open end of the detection housing 8 is provided with a strap groove 9. The strap groove 9 facilitates the installation and fixation of the device using straps. The device can be installed in positions such as fan guards without complicated tools and operations, making the installation process simpler and faster. It is especially suitable for temporary monitoring points or installation occasions where drilling is not allowed, further improving the installation convenience and applicability of the device.

[0036] The method of using the fan operation status detection device 10 based on the drain core baffle 4 structure is as follows:

[0037] Pre-installation preparation

[0038] Check the connection and compatibility between the air outlet of fan 11 and the air inlet of the testing device, and prepare any necessary installation tools such as cable ties. Confirm that there is sufficient space at the installation site to facilitate the installation and subsequent maintenance of the testing device, and also pay attention to whether there are any interfering factors that may affect the normal operation of the testing device (such as strong magnetic fields, excessive debris, etc.). If the installation is outdoors, rainproof and sunproof measures should also be considered.

[0039] Installation steps

[0040] Connecting the testing device to the fan 11: The air inlet of the testing device and the air outlet of the fan 11 are detachably and securely connected, ensuring a tight connection to prevent air leakage that could affect the accuracy of the test results. The specific connection method can be tailored to the actual product design, such as using clamps or flanges.

[0041] Fixed Testing Device: Using the binding strap groove 9 at the open end of the testing housing 8, the testing device can be easily fixed in a suitable position (such as the relevant part of the fan protective cover) using binding straps. For fans 11 with different power ratings, the cooling fans of power units with a power rating of 7.5kW or higher are generally horizontally top-mounted, with cooling air drawn from the bottom of the power unit to the top for heat dissipation, and the cooling airflow direction is upward. The testing device is installed on the side of the cooling fan outlet. The cooling fans of power units with a power rating of less than 7.5kW are generally horizontally bottom-mounted, with the cooling fan outlet directly acting on the bottom of the power unit, and the cooling airflow direction is upward. The testing device is installed on the heat dissipation outlet of the power unit body.

[0042] Connecting cable 2 (if any): If the device is equipped with cable 2, one end of cable 2 must be reliably electrically connected to the signal processing circuit, and the other end must be connected to the external control system or display device to ensure the accuracy and stability of signal transmission and to ensure that there are no loose or short circuits at any connection point.

[0043] Use and Monitoring

[0044] Start the fan 11: After starting the fan 11, the airflow generated by the fan 11 enters through the air inlet of the detection device, flows through the air duct, and the air pressure generated in the air duct pushes the baffle 4 to rotate around the shaft 6. Under normal operating conditions, when the air pressure is stable and sufficient, the baffle 4 can rotate to the designed angle. At this time, the signal acquisition mechanism 1 will detect the deflection displacement of the baffle 4 in real time and display the relevant information of the fan 11's operating status on the external control system or display device through multi-level signal output (digital and analog signals). For example, when the fan 11 speed is >50% of the rated speed (taking the basic embodiment as an example), the baffle 4 deflects, and the deflection angle is >30°, the signal detection module outputs a "normal operation" signal.

[0045] Routine monitoring: Operators observe the signals output by the external control system or display device. When the fan 11 is running stably and the parameters detected by the sensors match the set normal thresholds, it indicates that the fan 11 is operating normally. When insufficient air pressure is detected, or the deflection angle of the baffle 4 does not reach the threshold range or is less than the normal standard value, it means that the fan 11 may be operating abnormally. The device sends a switch alarm signal to remind the operator to handle it in time.

[0046] Troubleshooting and Maintenance: If abnormal alarms or problems with detection data are found during the use of the device, troubleshooting can be carried out based on the device's structure and working principle. The open design of the device facilitates troubleshooting by maintenance personnel.

[0047] Check whether the connecting parts of the testing device are loose, such as the connection between the testing housing 8 and the fan 11, the connection of the cable 2, etc.; check whether the baffle 4 can rotate normally, whether the counterweight or the magnetic block is functioning, and whether it is blocked or damaged by foreign objects.

[0048] For the signal acquisition module, check whether the non-contact displacement sensor (such as inductive proximity switch, Hall sensor) and the metal sensing area of ​​baffle 4 work together properly, and whether the signal processing circuit is operating normally. If a fault occurs, repair or replace the component in time.

[0049] Special Circumstances Operation

[0050] When the action threshold needs to be adjusted (for adjustable embodiments): If the wind pressure requirements change in the application scenario, the position of the signal detection module can be changed by adjusting the slide rail using the signal detection module, thereby flexibly adjusting the action threshold and allowing the device to adapt to new wind pressure conditions and usage requirements.

[0051] Remote monitoring requirements (for intelligent implementation): When the device integrates a wireless transmission module, operators can remotely obtain the operating status information of the wind turbine 11 from different locations through the corresponding monitoring system, realizing remote status monitoring and alarm functions. During remote monitoring, it is necessary to ensure that the wireless transmission module and signal processing circuit are properly connected and that the network signal is good.

[0052] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fan operating status detection device, characterized in that: include: The detection housing has an air inlet and an air outlet arranged opposite to each other. The air inlet is provided with an air inlet, and the air outlet is provided with an air outlet. The air outlet and the air inlet are connected inside the detection housing to form a through air duct. The air inlet is used to be detachably and fixedly connected to a fan. A baffle mechanism is provided, comprising a baffle and a rotating shaft. The rotating shaft is installed at the air outlet and rotatably connected to the air outlet. The baffle is fixedly connected to the rotating shaft and matches the air outlet. During normal operation of the fan, the air pressure generated by the air duct can drive the baffle to rotate to the designed angle. A limiting member, one end of which is fixedly connected to the detection housing, and the other end of which is used to contact the baffle to limit the extreme rotation angle of the baffle; as well as A signal acquisition mechanism is mounted on the detection housing. The signal acquisition mechanism includes a non-contact displacement sensor and a signal processing circuit to detect the deflection displacement of the baffle and output multi-level signals.

2. The fan operating state detecting apparatus according to claim 1, characterized by: The baffle mechanism also includes a counterweight block, which is disposed on the baffle so that when the air duct is in a windless state, the baffle will close the air outlet under the action of the weight of the counterweight block.

3. The fan operation state detecting apparatus according to claim 1, characterized by: The baffle mechanism further includes a first magnetic block and a second magnetic block. The first magnetic block is fixedly connected to the side of the rotating shaft away from the baffle, and the second magnetic block is fixedly connected to the outer wall of the detection housing. The first magnetic block and the second magnetic block are arranged facing each other with the same magnetic poles, so that the baffle closes the air outlet when the air duct is in a windless state.

4. The fan operating status detection device according to claim 2 or 3, characterized in that: The baffle is provided with a sealing strip at the position where it contacts the air outlet.

5. The fan operation state detecting apparatus according to claim 4, characterized by: The detection housing is made of PVC material, and the baffle is made of PVC board.

6. The wind turbine operating status detection device according to claim 5, characterized in that: The signal acquisition mechanism also includes a metal sheet. The non-contact displacement sensor is an inductive proximity switch. The metal sheet is disposed at the end of the baffle away from the rotating shaft, and the inductive proximity switch is correspondingly disposed on the outer wall of the detection housing.

7. The fan operation state detecting apparatus according to claim 6, characterized by: It also includes a cable, one end of which is electrically connected to the signal processing circuit, and the other end of which is electrically connected to an external control system or display device.

8. The fan operating state detecting apparatus according to claim 1, characterized by: The limiting component is a mechanical stop.

9. The fan operating state detecting apparatus according to claim 1, wherein The open end of the detection housing is provided with a strap groove.

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