Axial flow fan capable of carrying out fault early warning based on motor temperature

Abstract

The utility model discloses an axial flow fan for fault early warning based on motor temperature, which comprises a fan barrel, a motor arranged in the fan barrel, a power output end in power connection with a blade fan, a self-checking unit used for checking motor faults, a heat dissipation mechanism arranged on the periphery of the motor, and a temperature detection mechanism inserted into the motor to detect the temperature of the motor. The auxiliary air blowing mechanism assists in blowing air in the air blowing direction of the axial flow fan, a sensor is embedded into the motor, the internal temperature of the motor is directly collected, data are more accurate, the real-time rotating speed, the environment temperature and the motor starting duration are combined and compared with corresponding data in a database, and therefore whether the motor has corresponding faults or not is judged, multi-stage heat dissipation protection is achieved, and the service life of the motor is prolonged. Annular cooling fins and a circulating cooling pipeline are arranged on the periphery of the motor, heat of the motor is rapidly taken away, blowing design is assisted, when the temperature exceeds the standard, a blowing opening electrically stretches out, the brushless direct-drive fan dynamically adjusts the speed to supplement air, basic airflow is maintained, and shutdown is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of axial flow fans, specifically an axial flow fan that provides fault warning based on motor temperature. Background Technology

[0002] Axial flow fans are widely used fluid machinery in the industrial field. Their core component, the motor, operates in a high-temperature, high-load environment for a long time. Overheating of the motor windings or initial wear of the bearings only manifests as local temperature rise, which is easily missed by traditional methods, leading to equipment damage or even fire risks. Moreover, traditional heat dissipation structures mostly rely on a single heat sink or the airflow generated by the fan itself for air cooling, which is difficult to meet the continuous heat dissipation requirements of high-power equipment. Furthermore, in existing technologies, when the fan overheats, it needs to be actively shut down for heat dissipation, which will affect the use of other equipment and thus reduce the production efficiency of the entire plant or equipment area. Utility Model Content

[0003] The purpose of this invention is to provide an axial flow fan that provides fault warning based on motor temperature, which facilitates heat dissipation. When the machine is stopped, an auxiliary fan blows air to avoid affecting the working efficiency of other equipment.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: an axial flow fan with fault early warning based on motor temperature, comprising a fan casing and a motor, wherein the motor is disposed inside the fan casing and the power output end of the motor is poweredly connected to the blade fan.

[0005] The self-test unit is used to check for motor faults.

[0006] A heat dissipation mechanism is disposed on the outer periphery of the motor;

[0007] A temperature detection mechanism is inserted into the motor to detect the temperature of the motor.

[0008] An auxiliary blower mechanism is configured to extend into the blower cylinder to assist in blowing air in the direction of the axial flow blower.

[0009] In a further technical solution, the heat dissipation mechanism includes heat sinks that are evenly distributed in a circular shape on the outer periphery of the motor.

[0010] In a further technical solution, at least two cooling pipes are sleeved on the outer periphery of the motor. The cooling pipes pass through the heat sink and contact the heat sink. The at least two cooling pipes are connected and water is injected through a water injection pipe connected to the cooling pipes and water is discharged through a water outlet pipe connected to the cooling pipes.

[0011] In a further technical solution, the temperature detection mechanism includes at least three sensors, which are inserted into the motor to detect the internal temperature of the motor.

[0012] In a further technical solution, the auxiliary blower mechanism includes a housing fixed on the outer periphery of the blower cylinder. At least two housings are provided, and each housing has a blower nozzle that can slide into the blower cylinder. The blower nozzle is connected to the auxiliary blower inside the housing.

[0013] A further technical solution also includes a fire extinguishing mechanism, which includes a fire extinguishing port installed inside the housing. The fire extinguishing port can slide into the fan casing to spray extinguishing agent toward the motor. The fire extinguishing port is connected to an electronic fire extinguisher located inside the housing. A smoke sensor is installed inside the housing to detect whether a fire has occurred. The smoke sensor is electrically connected to the electronic fire extinguisher.

[0014] In a further technical solution, an alarm is fixed on the outer periphery of the fan casing and electrically connected to the sensor.

[0015] In a further technical solution, the water injection pipe and the water outlet pipe are connected to an external cooling water circuit.

[0016] A further technical solution is that an air cavity is provided inside the fan cylinder, and a filter screen is provided at the air inlet of the air cavity.

[0017] In summary, this utility model has the following beneficial effects: by using a sensor embedded inside the motor to directly collect the internal temperature of the motor, the data is more accurate. By combining the real-time speed, ambient temperature and motor start-up time with the corresponding data in the database, it can be determined whether the motor has any corresponding faults.

[0018] Multi-level heat dissipation protection: The motor is equipped with ring-shaped heat sinks and circulating cooling pipes to quickly remove heat from the motor.

[0019] The auxiliary air blowing design allows the air outlet to extend electrically when the temperature exceeds the standard, and the brushless direct-drive fan dynamically adjusts its speed to supplement airflow, maintain basic airflow, and avoid shutdown.

[0020] Smoke sensors and electronic fire extinguishers enable intelligent fire suppression and safety protection when a fire breaks out. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a first three-dimensional schematic diagram of this application;

[0023] Figure 2 This is a second three-dimensional schematic diagram of this application;

[0024] Figure 3 This is a schematic diagram of the motor and heat dissipation mechanism in this application.

[0025] In the diagram: 100, fan casing; 101, alarm; 102, housing; 103, blades; 104, shaft; 105, bracket; 106, motor; 107, sensor; 109, heat sink; 110, cooling pipe; 111, water inlet pipe; 112, water outlet pipe; 113, fire extinguishing outlet; 114, air outlet; 115, air chamber. Detailed Implementation

[0026] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0028] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0031] like Figures 1-3 As shown, an axial flow fan with fault early warning based on motor temperature includes a fan casing 100, an air cavity 115 inside the fan casing 100, a motor 106, the motor 106 is disposed inside the fan casing 100, the power output end of the motor 106 is poweredly connected to a rotating shaft 104, a blade 103 is fixed on the outer periphery of the rotating shaft 104, a bracket 105 is fixed inside the air cavity 115, the middle part of the bracket 105 is sleeved on the outer periphery of the rotating shaft 104, and rotates in cooperation with the rotating shaft 104;

[0032] The self-test unit is installed on the fan casing 100 and is used for motor self-testing to determine motor faults. This self-test unit is a motor self-test module in the prior art. After self-testing, it generates fault codes to facilitate maintenance personnel to perform testing and repair.

[0033] Example 1 of the self-testing unit uses a dynamic self-testing system that integrates sensors to detect short circuits, open circuits, speed, torque, vibration, etc., and constructs detection logic by combining existing fault analysis methods.

[0034] In the second embodiment of the self-test unit, a signal is generated through electromagnetic induction between the self-test magnet and the coil. This signal is then shaped by a circuit to output a square wave signal, enabling remote monitoring of the motor's startup and operating status. For example, the self-test device for a gyroscope instrument motor utilizes the gap between a hard magnetic material magnet and an enameled wire coil to achieve non-contact fault detection.

[0035] Example 3: Multi-parameter fusion intelligent inspection system: Integrating vibration, temperature, and current sensors, it analyzes data through edge computing to achieve energy efficiency optimization and remote monitoring. For example, the intelligent inspection sensor can monitor the motor vibration spectrum (0.1-10kHz) and temperature gradient (±0.5℃) in real time, providing early warning of bearing wear or winding overheating.

[0036] A heat dissipation mechanism is disposed on the outer periphery of the motor 106;

[0037] A temperature detection mechanism is inserted into the motor 106 to detect the temperature of the motor 106, and is electrically connected to the self-test unit to provide temperature data support for the self-test unit.

[0038] An auxiliary blower mechanism is configured to extend into the blower cylinder 100 to assist in blowing air in the direction of the axial flow blower.

[0039] In one embodiment, the heat dissipation mechanism includes heat sinks 109 arranged in a circumferential shape around the outer periphery of the motor 106.

[0040] In one embodiment, at least two cooling pipes 110 are sleeved on the outer periphery of the motor 106. The cooling pipes 110 pass through the heat sink 109 and contact the heat sink 109. The at least two cooling pipes 110 are connected and water is injected through a water injection pipe 111 connected to the cooling pipes 110 and water is discharged through a water outlet pipe 112 connected to the cooling pipes 110.

[0041] In one embodiment, the temperature detection mechanism includes at least three sensors 107. The sensors 107 are high-precision PT100 platinum resistance temperature sensors with a sampling frequency of 10Hz and an error range of ±0.5℃. The sensors 107 are inserted into the motor 106 to detect the internal temperature of the motor 106. The three sensors 107 are electrically connected to the central controller via connecting wires. The central controller is located inside the housing 102 and can also be integrated with a self-test module. The temperature data detected by the sensors is compared with the real-time speed data, the cumulative working time of the motor since this start, and the temperature threshold corresponding to the ambient temperature stored in the database. When the temperature data in the database deviates from the actual temperature data by more than 2℃, the self-test program is triggered and a fault code is uploaded.

[0042] In another embodiment, sensor 107 may be configured with six sensors, with two sensors embedded in the motor stator winding, near the rotor bearing, and at the root of the heat sink in the housing, respectively, to more accurately detect motor temperature data.

[0043] In one embodiment, the auxiliary blower mechanism includes a housing 102 fixed on the outer periphery of the blower cylinder 100. At least two housings 102 are provided. Each housing 102 has a blower 114 that can slide into the blower cylinder 100. The blower 114 is connected to the auxiliary blower inside the housing 102 and is used for blowing air. The auxiliary blower is driven by a brushless DC motor and its speed is dynamically adjusted according to the temperature of the main motor. The blower is driven by an electric push rod.

[0044] In one embodiment, a fire extinguishing mechanism is also included, which includes a fire extinguishing port 113 installed in the housing 102. The fire extinguishing port 113 can slide into the fan casing 100 to spray extinguishing agent toward the motor 106. The fire extinguishing port 113 is connected to an electronic fire extinguisher located in the housing 102. A smoke sensor is installed in the housing to detect whether a fire has occurred. The smoke sensor is electrically connected to the electronic fire extinguisher.

[0045] In one embodiment, an alarm 101 is fixed on the outer periphery of the fan casing 100 and electrically connected to the sensor 107. The alarm 101 is an audible and visual alarm.

[0046] Specifically, when the smoke sensor detects a smoke concentration >15% LEL, it activates the alarm. The alarm 101 sounds and flashes, and sprays a fire extinguishing agent, which may be heptafluoropropane or carbon dioxide.

[0047] In one embodiment, the water inlet pipe 111 and the water outlet pipe 112 are connected to an external water system.

[0048] In one embodiment, a wind cavity 115 is provided inside the fan casing 100, and a filter screen is provided at the air inlet of the wind cavity 115.

[0049] The working process of an axial flow fan that uses motor temperature for fault early warning is as follows:

[0050] First, the motor 106 starts working normally, driving the blade fan 103 to work, thereby generating airflow. When the sensor 107 detects that the temperature has reached a certain temperature threshold range, it controls the coolant to circulate. If the temperature continues to rise and triggers the alarm threshold, the motor 106 is controlled to stop working. At this time, the air outlet 114 extends, and the auxiliary fan works to blow air. The axial fan can still generate airflow, but it is lower than the airflow generated by the motor until the temperature drops below the alarm threshold. If the temperature still does not drop, the alarm 101 is triggered.

[0051] Fire extinguishing: If the smoke sensor detects a fire, it controls the electronic fire extinguisher to spray and extinguish the fire.

[0052] During normal operation, the sensor detects the motor's temperature data and compares it with the real-time speed data, the motor's cumulative operating time since the start-up, and the corresponding temperature thresholds of the ambient temperature stored in the database. When the temperature data in the database deviates from the actual temperature data by more than 2°C, a self-test program is triggered, and the corresponding fault code is uploaded to the central controller for fault warning or alert.

[0053] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0054] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0055] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A fault warning axial flow fan based on motor temperature, comprising a fan barrel (100), characterized in that, A motor (106) is arranged in the fan barrel (100), and a power output end of the motor (106) is in power connection with the fan blade (103); A self-checking unit is arranged for checking motor failure; A heat dissipation mechanism is arranged on the outer periphery of the motor (106); A temperature detection mechanism is inserted into the motor (106) to detect the temperature of the motor (106); An auxiliary blowing mechanism is configured to extend into the fan barrel (100) to assist blowing in the axial fan blowing direction.

2. The axial flow fan based on motor temperature for fault early warning according to claim 1, characterized in that, The heat dissipation mechanism comprises heat dissipation fins (109) arranged uniformly in a circumferential direction on the outer periphery of the motor (106).

3. The axial flow fan based on motor temperature for fault early warning according to claim 2, characterized in that, At least two cooling pipes (110) are arranged on the outer periphery of the motor (106), the cooling pipes (110) penetrate through the heat dissipation fins (109) and contact the heat dissipation fins (109), the at least two cooling pipes (110) are in communication, and water injection is performed through a water injection pipe (111) in communication with the cooling pipes (110), and water discharge is performed through a water discharge pipe (112) in communication with the cooling pipes (110).

4. The axial flow fan with fault pre-warning based on motor temperature according to claim 1, characterized in that, The temperature detection mechanism comprises at least three sensors (107) inserted into the motor (106) to detect the internal temperature of the motor (106).

5. The axial flow fan with fault pre-warning based on motor temperature according to claim 1, characterized in that, The auxiliary blowing mechanism comprises a box (102) fixed on the outer periphery of the fan barrel (100), the box (102) is provided with at least two, and a blowing port (114) capable of sliding into the fan barrel (100) is arranged in the box (102), the blowing port (114) is in communication with an auxiliary fan in the box (102).

6. The axial flow fan with fault pre-warning based on motor temperature according to claim 5, characterized in that, Further comprising a fire extinguishing mechanism, the fire extinguishing mechanism comprises a fire extinguishing port (113) arranged in the box (102), the fire extinguishing port (113) can slide into the fan barrel (100) and spray fire extinguishing agent towards the motor (106), the fire extinguishing port (113) is in communication with an electronic fire extinguisher in the box (102), a smoke sensor is arranged in the box (102) to detect whether a fire occurs, and the smoke sensor is in electrical connection with the electronic fire extinguisher.

7. The axial flow fan with fault pre-warning based on motor temperature according to claim 4, characterized in that, An alarm (101) is fixed on the outer periphery of the fan barrel (100) and is in electrical connection with the sensor (107).

8. The axial flow fan with fault pre-warning based on motor temperature according to claim 3, characterized in that, The water injection pipe (111) and the water discharge pipe (112) are in communication with an external cooling water pipe.

9. The axial flow fan with fault pre-warning based on motor temperature according to claim 1, characterized in that, A wind cavity (115) is arranged in the fan barrel (100), and a filter screen is arranged at an air inlet of the wind cavity (115).

Images