CN217270440U - Electronic fan monitoring system for engineering machinery and engineering machinery comprising same - Google Patents
Electronic fan monitoring system for engineering machinery and engineering machinery comprising same Download PDFInfo
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- CN217270440U CN217270440U CN202221316697.XU CN202221316697U CN217270440U CN 217270440 U CN217270440 U CN 217270440U CN 202221316697 U CN202221316697 U CN 202221316697U CN 217270440 U CN217270440 U CN 217270440U
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Abstract
The utility model relates to an engineering machine tool that is used for engineering machine tool's electronic fan monitoring system and includes it. An electronic fan monitoring system according to one embodiment includes: a voltage detection unit (3) that detects a voltage value relating to the operation of the electronic fan; a memory (4) storing a preset voltage threshold; an alarm device (5); and a controller (1) configured to trigger the alarm device (5) to alarm when a state in which the voltage value detected by the voltage detection unit (3) is greater than or equal to the voltage threshold value exceeds a first predetermined time, so as to prompt an operator to stop checking the electronic fan. According to the utility model discloses an electronic fan monitoring system can discover electronic fan work unusual suggestion operator in time to maintain during the electronic fan operation.
Description
Technical Field
The utility model relates to an engineering machine tool field, more specifically relates to an engineering machine tool that is used for engineering machine tool's electronic fan monitoring system and includes it.
Background
In general, in a construction machine such as an excavator or a loader, an engine or the like as a power plant is cooled by driving a cooling fan to generate cooling air. Conventional construction machines often employ a mechanical fan directly driven by an engine or a hydraulic fan driven by a hydraulic motor as a cooling fan. In recent years, more and more construction machines have employed electronic fans commonly used in passenger cars. The electronic fan can be more flexibly arranged than a mechanical fan directly driven by the engine, and the fan speed can be controlled independently of the engine speed. Compared with a hydraulic fan, the electronic fan does not need to increase the complexity of a hydraulic system, the cost is reduced, and the control is more convenient.
However, due to the bad working conditions of the engineering machinery such as the excavator, the electronic fan is easy to accumulate dust, even stones and the like are clamped between fan blades, and if the stones and the like are not timely disposed, the fan motor is burnt out due to long-time rotation blockage. The existing engineering machinery can only be stopped when the temperature of an engine is detected to be overhigh after the electronic fan is burnt out, and wait for maintenance personnel to bring a new electronic fan to replace the burnt-out electronic fan. The electronic fan unit has high value, and the project construction progress is easily influenced by long maintenance waiting time, so that huge economic loss is brought. Therefore, the demand for online monitoring of the health status of the electronic fan is increasing.
SUMMERY OF THE UTILITY MODEL
In view of the above problems in the prior art, an object of the present invention is to provide an electronic fan monitoring system for construction machinery, which can prompt an operator to perform maintenance in time when an electronic fan is out of operation.
The utility model discloses a first aspect provides an electronic fan monitoring system for engineering machine tool, this electronic fan monitoring system includes: a voltage detection unit that detects a voltage value related to an operation of the electronic fan; a memory storing a preset voltage threshold; an alarm device; and a controller configured to trigger the alarm device to alarm when a state that the voltage value detected by the voltage detection unit is greater than or equal to the voltage threshold value exceeds a first predetermined time, so as to prompt an operator to check the electronic fan in a shutdown manner.
Preferably, the electronic fan monitoring system of the present invention may have one or more of the following advantageous technical features:
the electronic fan monitoring system further comprises a cleaning device, and when the state that the voltage value detected by the voltage detection unit is greater than or equal to the voltage threshold value exceeds a second preset time, the controller starts the cleaning device to clean the electronic fan;
the cleaning device comprises a spraying kettle and a spraying kettle motor for driving the spraying kettle;
the second predetermined time is greater than the first predetermined time;
the first predetermined time is 5 seconds;
the second predetermined time is 10 seconds;
the voltage detection unit comprises a resistor connected with the electronic fan in series and a voltmeter for detecting the voltage at two ends of the resistor;
the controller is a separate electronic control module or the controller is integrated into the engine control module.
A second aspect of the present invention provides an engineering machine including an electronic fan and an electronic fan monitoring system according to the first aspect described above.
According to the utility model discloses an electronic fan monitoring system can discover electronic fan work unusual and suggestion operator in time maintains the maintenance during electronic fan operation.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings:
fig. 1 is a schematic diagram of an electronic fan monitoring system according to an embodiment of the present invention;
FIG. 2 is a flow chart of the operation of the electronic fan monitoring system of the embodiment shown in FIG. 1.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. The described embodiments are not intended to limit the present invention, but are merely exemplary, and not all the features or combinations thereof described in the embodiments are essential to the present invention.
Fig. 1 is a schematic structural diagram of an electronic fan monitoring system according to an embodiment of the present invention. As shown in fig. 1, the electronic fan monitoring system in this embodiment includes a controller 1, an engine speed sensor 2, a voltage detection unit 3, a memory 4, an alarm device 5, and a spray can motor 6.
The controller 1 may be an electronic control module powered by a battery, for example, a storage battery of the construction machine, for controlling the operation of the electronic fan. For example, the controller 1 starts the electronic fan and controls the rotation speed thereof upon receiving a rotation speed signal detected by the engine rotation speed sensor 2. The controller 1 may be a separate electronic control module or may be integrated into an engine control module. The conventional operation control of the electronic fan is well known to those skilled in the art, and a detailed description thereof is omitted herein. The electronic fan health status online monitoring and abnormality processing functions implemented by the controller 1 in the present embodiment will be mainly described below.
In the present embodiment, the voltage detection unit 3 detects a voltage value related to the operation of the electronic fan. For example, the voltage detection unit 3 may include a resistor connected in series with the electronic fan and a voltmeter that detects a voltage across the resistor. The resistance of the resistor is fixed, so that the voltage value detected by the voltage detection unit 3 can reflect the magnitude of the current flowing through the electronic fan.
The memory 4 stores a preset voltage threshold. The voltage threshold may be an upper limit of a voltage at which the electronic fan operates normally. The memory 4, which is schematically shown in fig. 1, is a separate component from the controller 1 and is in signal connection with the controller 1. However, it will be understood by those skilled in the art that the functions of the memory 4 may also be integrated in the electronic control module together with the functions of the controller 1.
The controller 1 receives the voltage value detected by the voltage detection unit 3 and compares it with a voltage threshold value stored in the memory 4. When the electronic fan is blocked due to the fact that dust is accumulated excessively and even stones and the like are clamped between fan blades, current can be increased, and therefore coils of the fan motor are overheated, and the fan motor can be burnt. According to one embodiment, when the voltage value detected by the voltage detection unit 3 is greater than the voltage threshold value stored in the memory 4, it may be determined that the fan motor is locked.
In the present embodiment, in order to more reliably determine the locked-rotor of the fan motor to avoid unnecessary stop, a timer is also provided inside the controller 1. The controller 1 is configured to determine that the fan motor is locked only when a state in which the voltage value detected by the voltage detection unit 3 is greater than or equal to the voltage threshold value exceeds a first predetermined time. The first predetermined time may be preset by the operator and stored in the memory 4. For example, the first predetermined time may be set to 5 seconds.
When the blockage of the fan motor is judged, the controller 1 triggers the alarm device 5 to give an alarm to prompt an operator to stop the machine and check the electronic fan, and remove dust, stones and the like which cause the blockage. In this embodiment, the alarm device 5 is a buzzer. In other embodiments, other warning devices such as flashing warning lights may be used.
Typically, the operator will stop and check the electronic fan after noticing the alarm signal from the alarm device 5, and the electronic fan monitoring system will automatically shut down. However, it may happen that the operator fails to stop the inspection of the electronic fan in time. At this time, in order to ensure that the electronic fan is not damaged due to a long-time high-load operation, the controller 1 activates the washing device to wash the electronic fan when a state in which the voltage value detected by the voltage detection unit 3 is greater than or equal to the voltage threshold value exceeds a second predetermined time. The second predetermined time may be preset by the operator and stored in the memory 4. For example, the second predetermined time may be set to 10 seconds. The cleaning device may include a spray pot and a spray pot motor 6 for driving the spray pot. The spray jug may be connected to the water tank via a water pipe. The controller 1 triggers the spray pot motor 6 to operate to flush the electronic fan with the spray pot.
In this embodiment, the second predetermined time is greater than the first predetermined time. In another embodiment, the second predetermined time may be set to be smaller than the first predetermined time. That is, when detecting the fan motor stall, the controller 1 first starts the cleaning device to clean the electronic fan, and if the problem of the fan motor stall cannot be solved after cleaning, prompts the operator to stop and check the electronic fan through the alarm device.
FIG. 2 is a flow chart of the operation of the electronic fan monitoring system in the embodiment shown in FIG. 1.
First, in step S1, an initialization process is performed. For example, the initialization process may include: setting a sampling voltage value (for example, 1V) of the voltage detection unit 3; reset timer inside controller 1 to zero and set sampling time (e.g. 1 second); reading a preset voltage threshold value, a first preset time and a second preset time from the memory 4; and setting the control commands of the alarm device 5 and the spraying kettle motor 6 to be closed.
Then, in step S2, the controller 1 determines whether the engine is started based on the signal from the engine speed sensor 2. If an affirmative determination is made in step S2, the voltage value detected by the voltage detection unit 3 is continuously monitored next in step S3. Otherwise, return to step S1.
In step S4, which follows step S3, the controller 1 compares the voltage value detected by the voltage detection unit 3 with a preset voltage threshold value to determine whether the voltage detection value is greater than or equal to the preset voltage threshold value. If an affirmative determination is made in step S4, a timer is next operated in step S5 to count the elapsed time from when the voltage detection value reaches the voltage threshold value. Otherwise, it returns to step S3 to continue monitoring the voltage value detected by the voltage detection unit 3.
In step S6 immediately after step S5, the controller 1 determines whether the state in which the voltage value detected by the voltage detection unit 3 is greater than or equal to the preset voltage threshold value has continued for a first predetermined time or more, for example, 5 seconds. If an affirmative determination is made in step S6, the controller 1 activates the alarm device 5 in the next step S7. Otherwise, the processing of steps S3 to S6 is repeatedly performed.
In step S8 immediately after step S7, the controller 1 determines whether the engine is stopped based on the signal from the engine speed sensor 2. If a positive determination is made in step S8, this indicates that the operator has stopped checking the electronic fan at the prompt of the alarm device 5, and the electronic fan monitoring system is accordingly shut down, and this cycle of the process is terminated.
On the other hand, if a negative determination result is obtained in step S8, it indicates that the operator has not stopped to check the electronic fan. In the next step S9, the controller 1 determines whether the state in which the voltage value detected by the voltage detection unit 3 is greater than or equal to the preset voltage threshold value has continued for a second predetermined time or more, for example, 10 seconds. If a negative determination is made in step S9, the process returns to step S8 to determine again whether the engine is stopped, with the warning device 5 continuing to warn. If an affirmative determination is made in step S9, the controller 1 triggers the spray pot motor 6 to operate to flush the electric fan using the spray pot in the next step S10, and then terminates this cycle of the flow.
According to the utility model discloses an electronic fan monitoring system is applicable to the abominable engineering machine tool of operating mode very much, especially excavator.
Through detecting the voltage value relevant with the operation of electronic fan and comparing it with the predetermined voltage threshold value of storage in memory 4 by voltage detecting unit 3, according to the utility model discloses an electronic fan monitoring system can real-time supervision electronic fan's health condition, can indicate the operator in time to maintain when discovering electronic fan work unusual, has avoided electronic fan to burn out because fan motor is long-time locked rotor. And the cleaning device can be started to clean the fan under the condition that an operator cannot stop to inspect or maintain the electronic fan in time. Therefore, the utility model discloses an electronic fan monitoring system has prolonged electronic fan's life.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments disclosed above without departing from the scope or spirit of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples disclosed herein be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims and their equivalents.
Claims (10)
1. An electronic fan monitoring system for a construction machine, comprising:
a voltage detection unit (3) that detects a voltage value relating to the operation of the electronic fan;
a memory (4) storing a preset voltage threshold;
an alarm device (5); and
a controller (1) configured to trigger the alarm device (5) to alarm when a state in which the voltage value detected by the voltage detection unit (3) is greater than or equal to the voltage threshold value exceeds a first predetermined time, so as to prompt an operator to stop checking the electronic fan.
2. The electronic fan monitoring system according to claim 1, further comprising a cleaning device, wherein the controller (1) activates the cleaning device to clean the electronic fan when a state in which the voltage value detected by the voltage detection unit (3) is greater than or equal to the voltage threshold value exceeds a second predetermined time.
3. The electronic fan monitoring system of claim 2, wherein the cleaning device comprises a spray jug and a spray jug motor (6) for driving the spray jug.
4. The electronic fan monitoring system of claim 2 or 3, wherein the second predetermined time is greater than the first predetermined time.
5. The electronic fan monitoring system of any of claims 1-3, wherein the first predetermined time is 5 seconds.
6. The electronic fan monitoring system of claim 2 or 3, wherein the second predetermined time is 10 seconds.
7. The electronic fan monitoring system according to any of claims 1 to 3, characterized in that the voltage detection unit (3) comprises a resistor in series with the electronic fan and a voltmeter detecting the voltage across the resistor.
8. The electronic fan monitoring system according to any of claims 1-3, characterized in that the controller (1) is a separate electronic control module or the controller (1) is integrated in an engine control module.
9. A working machine, characterized by comprising an electronic fan and an electronic fan monitoring system according to any of claims 1-8.
10. The work machine of claim 9, wherein the work machine is an excavator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221316697.XU CN217270440U (en) | 2022-05-30 | 2022-05-30 | Electronic fan monitoring system for engineering machinery and engineering machinery comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221316697.XU CN217270440U (en) | 2022-05-30 | 2022-05-30 | Electronic fan monitoring system for engineering machinery and engineering machinery comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217270440U true CN217270440U (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221316697.XU Active CN217270440U (en) | 2022-05-30 | 2022-05-30 | Electronic fan monitoring system for engineering machinery and engineering machinery comprising same |
Country Status (1)
| Country | Link |
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| CN (1) | CN217270440U (en) |
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2022
- 2022-05-30 CN CN202221316697.XU patent/CN217270440U/en active Active
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