Gear lubrication oil shortage alarm device of ball mill
By installing a combination of an infrared thermometer and an audible and visual alarm on the ball mill, the problem of difficult monitoring of the lubrication status of the ball mill gears is solved, enabling real-time and accurate oil shortage alarms, preventing equipment damage, and the structure is simple and low in cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAOTOU IRON & STEEL (GROUP) CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-19
AI Technical Summary
Existing technologies cannot monitor the lubrication status of ball mill gears in real time and accurately, especially in the event of a sudden interruption of lubrication, which can lead to an abnormal increase in tooth surface temperature, potentially causing tooth surface wear and equipment shutdown. Existing monitoring methods suffer from problems of lag and high cost.
The device uses a combination of an infrared thermometer, a protective cover, a display, and an audible and visual alarm. The infrared thermometer is fixedly installed outside the large gear ring cover of the ball mill. The protective cover isolates the lubricating oil from contamination. The display has preset alarm thresholds and a control unit. The audible and visual alarm sounds an alarm when the temperature exceeds the threshold.
It enables real-time temperature monitoring of the pinion tooth surface in ball mills, reducing errors, ensuring the stability and accuracy of the device, issuing timely oil shortage alarms to prevent equipment damage, and features a simple structure, low cost, and sensitive response, adapting to complex working conditions.
Smart Images
Figure CN224261422U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical equipment condition monitoring technology, and in particular to a gear lubrication oil shortage alarm device for a ball mill. Background Technology
[0002] Ball mills are key grinding equipment widely used in mineral processing, building materials, chemical and other industrial sectors. Their transmission systems typically employ large and small gears to transmit enormous torque. To ensure the normal operation and service life of the gears, their meshing surfaces must be adequately and continuously lubricated, usually using lubricating oil or grease. In actual operation, due to various reasons (such as lubrication system failure, oil / grease leakage, untimely or insufficient replenishment, etc.), gear lubrication may become insufficient or fail. Once lubrication is inadequate, the friction of the gear meshing surfaces will increase sharply, leading to an abnormal rise in tooth surface temperature. If this condition persists, it will accelerate tooth surface wear, cause scuffing or even tooth breakage, ultimately leading to ball mill shutdown, resulting in significant production losses and maintenance costs. Existing monitoring methods usually rely on manual periodic inspections and checks of lubrication system pressure or flow. These methods are lagging and cannot accurately detect the deterioration of tooth surface lubrication in real time, especially in the event of sudden lubrication interruption. Some complex online monitoring systems exist, but they are costly, structurally complex, and their reliability under harsh operating conditions (such as dust and vibration) needs improvement. Therefore, there is an urgent need for a device that is simple in structure, low in cost, sensitive in response, and reliable in operation, capable of monitoring the lubrication status of ball mill gears in real time and promptly alarming when abnormal temperature rise is caused by insufficient oil. Utility Model Content
[0003] The purpose of this invention is to provide a gear lubrication oil shortage alarm device for ball mills to solve the problems existing in the prior art. It has a simple structure, is easy to use, has low cost, is sensitive to response, and is reliable in operation.
[0004] To achieve the above objectives, this utility model provides the following solution:
[0005] This utility model provides a gear lubrication oil shortage alarm device for a ball mill, comprising: an infrared thermometer, a protective cover, a display, and an audible and visual alarm. The infrared thermometer is fixedly installed outside the large gear ring cover of the ball mill and passes through the large gear ring cover, with its detection direction aimed at the tooth surface of the small gear to measure the tooth surface temperature of the small gear. The protective cover is welded and fixed inside the large gear ring cover and is located in front of the lens of the infrared thermometer to prevent gear lubricating oil from contaminating the lens of the infrared thermometer, while allowing the detection rays of the infrared thermometer to pass through. The display is signal-connected to the infrared thermometer to display the tooth surface temperature of the small gear in real time. The display has a preset alarm threshold and a control unit is installed inside the display. The audible and visual alarm is signal-connected to the control unit of the display. When the infrared thermometer detects that the tooth surface temperature of the small gear is ≥ the preset alarm threshold, the control unit drives the audible and visual alarm to emit an alarm signal.
[0006] Preferably, the detection direction of the infrared thermometer forms an angle of 45° to 60° with the normal to the tooth surface of the ball mill pinion.
[0007] Preferably, the protective cover is a sealed shell structure with a light-transmitting hole on the side facing the ball mill pinion, and the axis of the light-transmitting hole is coaxial with the detection optical path of the infrared thermometer.
[0008] Preferably, the protective cover is welded to the upper side of the inner wall of the ball mill's large gear ring cover, near the meshing area of the ball mill's small gear, and the installation angle between the protective cover and the inner wall of the ball mill's large gear ring cover is 45° to 60°.
[0009] Preferably, the audible and visual alarm is an integrated audible and visual alarm, which integrates a buzzer unit and a flashing warning light.
[0010] Preferably, the control unit built into the display integrates a temperature comparison module and an alarm driving module. The temperature comparison module compares the tooth surface temperature of the ball mill pinion detected by the infrared thermometer with the preset alarm threshold in real time. The alarm driving module activates the audible and visual alarm when the infrared thermometer detects that the tooth surface temperature of the ball mill pinion is greater than or equal to the preset alarm threshold.
[0011] Preferably, the infrared thermometer is fixed to the large gear ring cover of the ball mill by bolts.
[0012] Preferably, the preset alarm threshold is set within the range of 70℃ to 90℃.
[0013] The present invention achieves the following technical advantages over the prior art:
[0014] The purpose of this invention is to provide a gear lubrication low-oil alarm device for a ball mill. An infrared thermometer accurately acquires the temperature information of the pinion gear tooth surface, directly measuring the temperature of the target area, reducing errors caused by inaccurate measurement location, and improving measurement accuracy. This provides a reliable foundation for subsequent low-oil warnings based on accurate temperature data. A protective cover is fixed by welding, ensuring its stability and preventing displacement due to equipment vibration. A barrier in front of the lens isolates lubricating oil, effectively preventing lubricating oil from adhering to the lens and affecting the infrared thermometer's detection performance, ensuring its continuous normal operation and stable acquisition of accurate temperature data. This, in turn, guarantees the reliability and effectiveness of the entire alarm device. A real-time temperature display allows operators to intuitively understand the temperature status of the pinion gear tooth surface, facilitating real-time monitoring of equipment operation. Preset alarm thresholds and control unit settings enable intelligent analysis and judgment of temperature data. When the temperature reaches a specific value, a corresponding action is triggered, providing a basis for automatic alarm functionality. The signal connection between the audible and visual alarm and the control unit realizes the automated alarm function of the entire device. When the tooth surface temperature reaches or exceeds the preset alarm threshold, an alarm signal can be issued in a timely manner. Through the combination of sound and light signals, the alarm can effectively attract the attention of operators in various environments, enabling them to promptly detect potential lubrication problems and take timely measures to avoid equipment damage. Attached Figure Description
[0015] 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.
[0016] Figure 1 A schematic diagram of the gear lubrication oil shortage alarm device for a ball mill provided by this utility model;
[0017] In the picture: 1. Infrared thermometer; 2. Protective cover; 3. Display; 4. Audible and visual alarm; 5. Bolt; 6. Large gear ring cover of ball mill; 7. Pinion; 8. Large gear. Detailed Implementation
[0018] 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.
[0019] The purpose of this invention is to provide a gear lubrication oil shortage alarm device for ball mills to solve the problems existing in the prior art. It has a simple structure, is easy to use, has low cost, is sensitive to response, and is reliable in operation.
[0020] 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.
[0021] This utility model provides a gear lubrication oil shortage alarm device for a ball mill, such as... Figure 1 As shown, the device includes: an infrared thermometer 1, a protective cover 2, a display 3, and an audible and visual alarm 4. The infrared thermometer 1 is fixedly installed outside the large gear ring cover 6 of the ball mill and passes through the large gear ring cover 6. Its detection direction is aimed at the tooth surface of the small gear 7 of the ball mill to measure the tooth surface temperature of the small gear 7. The protective cover 2 is welded and fixed inside the large gear ring cover and is located in front of the lens of the infrared thermometer 1 to prevent gear lubricating oil from contaminating the lens of the infrared thermometer 1, and allows the detection rays of the infrared thermometer 1 to pass through. The display 3 is signal-connected to the infrared thermometer 1 to display the tooth surface temperature of the small gear 7 of the ball mill in real time. The display 3 has a preset alarm threshold and a control unit is installed inside the display 3. The audible and visual alarm 4 is signal-connected to the control unit of the display 3. When the infrared thermometer 1 detects that the tooth surface temperature of the small gear 7 of the ball mill is greater than or equal to the preset alarm threshold, the control unit drives the audible and visual alarm 4 to emit an alarm signal. Infrared thermometer 1 accurately acquires the temperature information of the tooth surface of the pinion 7 in the ball mill, directly measuring the temperature of the target area, reducing errors caused by inaccurate measurement positions, improving measurement accuracy, and providing a reliable foundation for subsequent oil shortage warnings based on accurate temperature data. The protective cover 2 is fixed by welding, ensuring its stability and preventing displacement due to equipment vibration. Located in front of the lens to isolate lubricating oil, it effectively prevents lubricating oil from adhering to the lens and affecting the detection performance of the infrared thermometer 1, ensuring its normal operation and stable acquisition of accurate temperature data, thereby guaranteeing the reliability and effectiveness of the entire alarm device. Display 3 displays the temperature in real time, allowing operators to intuitively understand the temperature status of the pinion 7 tooth surface, facilitating real-time monitoring of equipment operation and ensuring the meshing transmission of the large gear 8 and pinion 7. The preset alarm threshold and control unit settings enable intelligent analysis and judgment of temperature data, triggering corresponding actions when the temperature reaches a specific value, providing a basis for automatic alarm functionality. The signal connection between the audible and visual alarm 4 and the control unit realizes the automated alarm function of the entire device. When the tooth surface temperature reaches or exceeds the preset alarm threshold, an alarm signal can be issued in a timely manner. Through the combination of sound and light signals, the alarm can effectively attract the attention of operators in various environments, enabling them to promptly detect potential lubrication problems and take timely measures to avoid equipment damage.
[0022] In a preferred embodiment, the detection direction of the infrared thermometer 1 forms an angle of 45° to 60° with the normal to the tooth surface of the ball mill pinion 7. This angle setting ensures that the infrared thermometer 1 obtains more accurate and comprehensive tooth surface temperature information. Within this angle range, the infrared detection rays can fully cover a certain area of the tooth surface, avoiding measurement blind spots caused by angle issues, thereby measuring the tooth surface temperature more accurately, improving the reliability and representativeness of temperature measurement, and providing more accurate data for accurately judging the lubrication status.
[0023] In a preferred embodiment, the protective cover 2 is a sealed shell structure with a light-transmitting hole on the side facing the ball mill pinion 7. The axis of the light-transmitting hole is coaxial with the detection optical path of the infrared thermometer 1. The sealed shell structure can better prevent gear lubricating oil from contaminating the lens of the infrared thermometer 1, providing better protection than a general structure. The coaxiality of the light-transmitting hole with the detection optical path ensures that the infrared detection rays pass smoothly without deflection or obstruction, minimizing the impact on temperature measurement and ensuring that the accuracy of temperature measurement is not interfered with by the structure of the protective cover 2.
[0024] In a preferred embodiment, the protective cover 2 is welded to the upper side of the inner wall of the ball mill's large gear ring cover 6, near the meshing area of the ball mill's small gear 7. The installation angle between the protective cover 2 and the inner wall of the ball mill's large gear ring cover 6 is 45° to 60°. Welding it to the upper side near the meshing area of the small gear 7 maximizes the interception of splashed lubricating oil, effectively protecting the lens of the infrared thermometer 1. The 45° to 60° installation angle not only ensures the stable installation of the protective cover 2 but also ensures the protective effect without interfering with surrounding components, ensuring that the entire device has a compact structure and good protective performance, making it more suitable for stable operation in the complex working environment of the ball mill.
[0025] In a preferred embodiment, the audible and visual alarm 4 is an integrated audible and visual alarm, which integrates a buzzer unit and a flashing warning light. This integrated design allows for simultaneous alarm signal emission via both sound and light, providing strong visibility in various environments. Whether in a noisy work environment, operators can promptly detect the alarm through the flashing warning light; or in dimly lit conditions, the sound emitted by the buzzer unit will attract attention, significantly increasing the probability of the alarm signal being detected.
[0026] In a preferred embodiment, the control unit built into the display 3 integrates a temperature comparison module and an alarm driving module. The temperature comparison module compares the tooth surface temperature of the ball mill pinion 7 detected by the infrared thermometer 1 with a preset alarm threshold in real time. The alarm driving module activates the audible and visual alarm 4 when the infrared thermometer 1 detects that the tooth surface temperature of the ball mill pinion 7 is greater than or equal to the preset alarm threshold. The integration of the temperature comparison and alarm driving modules in the control unit achieves professional and modular processing of temperature data and alarm triggering. The real-time comparison by the temperature comparison module ensures timely monitoring of temperature changes, while the alarm driving module accurately activates the audible and visual alarm 4 based on the comparison result, improving the timeliness and accuracy of the alarm response and making the entire alarm system more intelligent and efficient.
[0027] In a preferred embodiment, the infrared thermometer 1 is fixed to the large gear ring cover 6 of the ball mill by bolts 5. The installation by bolts 5 is firm and stable, and can adapt to the vibration and shaking during the operation of the ball mill. It is not easy to loosen, ensuring that the infrared thermometer 1 always stays in the accurate measurement position, ensuring the stability and continuity of its measurement of the tooth surface temperature of the pinion 7 of the ball mill, and providing a hardware foundation for the reliable operation of the system.
[0028] In a preferred embodiment, the preset alarm threshold is set within the range of 70℃ to 90℃. This preset alarm threshold range is determined based on research into the temperature changes of the gear tooth surface during normal operation of the ball mill and under conditions of insufficient lubrication. Setting the threshold within this range accurately distinguishes between abnormal temperatures that may be caused by normal operation and insufficient lubrication. When the temperature reaches this range, an alarm is triggered, avoiding frequent false alarms due to an excessively low threshold setting, while also preventing the failure to detect lubrication problems in a timely manner due to an excessively high threshold, thus achieving a balance between accuracy and timeliness of the alarm.
[0029] 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 gear lubrication oil shortage alarm device for a ball mill, characterized in that: include: An infrared thermometer is fixedly installed outside the large gear ring cover of the ball mill and passes through the large gear ring cover of the ball mill. Its detection direction is aligned with the tooth surface of the small gear of the ball mill to measure the tooth surface temperature of the small gear of the ball mill. A protective cover is welded and fixed inside the large gear ring cover and is located in front of the lens of the infrared thermometer to prevent gear lubricating oil from contaminating the lens of the infrared thermometer, while allowing the detection rays of the infrared thermometer to pass through. A display, connected to the infrared thermometer to display the real-time surface temperature of the pinion gear in the ball mill, the display having a preset alarm threshold, and a control unit within the display; and An audible and visual alarm is connected to the control unit of the display; when the infrared thermometer detects that the tooth surface temperature of the pinion of the ball mill is greater than or equal to the preset alarm threshold, the control unit drives the audible and visual alarm to issue an alarm signal.
2. The gear lubrication oil shortage alarm device for a ball mill according to claim 1, characterized in that: The detection direction of the infrared thermometer forms an angle of 45° to 60° with the normal to the tooth surface of the ball mill pinion.
3. The gear lubrication oil shortage alarm device for a ball mill according to claim 2, characterized in that: The protective cover is a sealed shell structure with a light-transmitting hole on the side facing the ball mill pinion. The axis of the light-transmitting hole is coaxial with the detection optical path of the infrared thermometer.
4. The gear lubrication oil shortage alarm device for a ball mill according to claim 3, characterized in that: The protective cover is welded to the upper side of the inner wall of the large gear ring cover of the ball mill, near the meshing area of the small gear of the ball mill, and the installation angle between the protective cover and the inner wall of the large gear ring cover of the ball mill is 45° to 60°.
5. The gear lubrication oil shortage alarm device for a ball mill according to claim 1, characterized in that: The sound and light alarm is an integrated sound and light alarm, which integrates a buzzer unit and a flashing warning light.
6. The gear lubrication oil shortage alarm device for a ball mill according to claim 1, characterized in that: The control unit built into the display integrates a temperature comparison module and an alarm driving module. The temperature comparison module compares the tooth surface temperature of the ball mill pinion detected by the infrared thermometer with the preset alarm threshold in real time. The alarm driving module activates the audible and visual alarm when the infrared thermometer detects that the tooth surface temperature of the ball mill pinion is greater than or equal to the preset alarm threshold.
7. The gear lubrication oil shortage alarm device for a ball mill according to claim 1, characterized in that: The infrared thermometer is fixed to the large gear ring cover of the ball mill by bolts.
8. The gear lubrication oil shortage alarm device for a ball mill according to claim 1, characterized in that: The preset alarm threshold is set within the range of 70℃ to 90℃.