Temperature measuring device for grinding roller bearing of coal mill

Abstract

The utility model belongs to the technical field of grinding roller bearing temperature measurement, and particularly relates to a coal mill grinding roller bearing temperature measuring device which comprises a coal mill main body, a connecting cylinder is arranged on one side of the coal mill main body, a plurality of sliding limiting blocks are installed on the inner side of the connecting cylinder in a sliding mode, and a temperature measuring box is fixedly installed on one side of the connecting cylinder. A mounting hole is formed in the upper portion of the coal mill body, a connecting cylinder is inserted into the inner side of the mounting hole, a second motor is controlled to drive a worm to drive a worm gear, the worm gear can drive a bidirectional lead screw to rotate after rotating, and the bidirectional lead screw can drive a sliding plate and a sliding limiting block of the coal mill to slide through thread fit after rotating. The sliding limiting block can abut against the coal mill body after sliding out of the inner side of the connecting cylinder, so that the temperature measuring box can be clamped to the upper portion of the coal mill body through cooperation of the connecting cylinder and the sliding limiting block, and the temperature measuring box is convenient and rapid to disassemble, assemble and replace in the later period.

Description

Technical Field

[0001] This utility model relates to the field of temperature measurement technology for grinding roller bearings, and in particular to a temperature measurement device for grinding roller bearings in coal mills. Background Technology

[0002] In thermal power generation, the coal mill is a crucial piece of equipment, responsible for grinding raw coal into pulverized coal suitable for combustion. As a key component of the coal mill, the grinding rollers endure enormous pressure and friction during operation, and the working condition of their bearings directly affects the mill's operating efficiency and stability. The temperature of the grinding roller bearings is a vital parameter reflecting their working condition. Excessively high bearing temperatures can lead to accelerated bearing wear, lubrication failure, and even serious malfunctions such as bearing seizure and grinding roller damage, thereby affecting the normal operation of the entire thermal power generation system, causing power outages and significant economic losses.

[0003] In the medium-speed coal mill of the power unit, temperature sensing elements are installed in the bearings of all three grinding rollers to monitor the bearing temperature in real time. When the grinding rollers experience faults such as bearing wear, wear cracking, or seizing, the bearing temperature will rise. The operating status of the grinding rollers is monitored in real time through the temperature measuring points. The original installation of the grinding roller bearing temperature sensing elements was to enter the internal space of the coal mill 1 meter above the inspection hole, insert it into the grinding roller bearing, and fix it with threads. This installation method exposed approximately 1.5 meters of φ6 thermal resistors with protective tubes inside the coal mill, causing frequent failures of the grinding roller bearing temperature sensing elements.

[0004] Traditional methods for measuring the temperature of coal mill roller bearings have several shortcomings. Some methods rely on manual, periodic inspections using handheld thermometers to measure the bearing surface temperature. This approach is not only inefficient but also lacks real-time monitoring, making it easy to miss abnormal temperature increases during inspection intervals and leading to malfunctions. Other methods use ordinary temperature sensors, but improper sensor placement prevents accurate measurement of the bearing's internal temperature, and the sensors have weak anti-interference capabilities, making measurement data prone to deviation in the complex electromagnetic environment of the coal mill, thus failing to provide reliable temperature data for equipment operation. Developing a high-precision, real-time, and reliable coal mill roller bearing temperature measurement device is of significant practical importance; therefore, we have proposed a coal mill roller bearing temperature measurement device. Utility Model Content

[0005] The purpose of this invention is to provide a temperature measuring device for the bearings of coal mill rollers, which solves the existing problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A coal mill roller bearing temperature measuring device includes a coal mill body. A connecting cylinder is provided on one side of the coal mill body. Multiple sliding limit blocks are slidably installed on the inner side of the connecting cylinder. A temperature measuring box is fixedly installed on one side of the connecting cylinder. Air filter plates are fixedly installed on the front and rear sides of the temperature measuring box. A temperature measuring circuit board is fixedly installed on one side of the air filter plate. A first motor is also fixedly installed on one side of the air filter plate. A drive shaft is fixedly installed at the output end of the first motor. Fan blades are fixedly installed on the outer side of the drive shaft.

[0008] Preferably, a rotating shaft is rotatably mounted on one side of the air filter plate, and a transmission gear is fixedly mounted on the outer side of the rotating shaft and the drive shaft. Two adjacent transmission gears mesh with each other. A rotating cylinder is rotatably mounted on the inner side of the connecting cylinder, and a gear ring is fixedly mounted on the inner side of the rotating cylinder. The transmission gear and the gear ring mesh with each other. A filter hole adsorption cleaning cotton is fixedly mounted on one side of the rotating cylinder, and the filter hole adsorption cleaning cotton is in contact with the air filter plate.

[0009] Preferably, two mounting plates are fixedly installed on the inner side of the connecting cylinder, a bidirectional lead screw is rotatably installed on the inner side of the mounting plate, a limit rod is fixedly installed on the inner side of the mounting plate, two sliding plates are threaded on the outer side of the bidirectional lead screw, the sliding plates are slidably installed on the outer side of the limit rod, and the sliding limit block is fixedly installed on one side of the sliding plate.

[0010] Preferably, a second motor is fixedly installed on one inner wall of the connecting cylinder, a worm is fixedly installed at the output end of the second motor, and a worm wheel is fixedly installed on the outer side of the bidirectional lead screw, with the worm and worm wheel meshing with each other.

[0011] Preferably, the outer side of the connecting cylinder is provided with multiple through grooves, and the sliding limiting block is slidably installed on the inner side of the through grooves.

[0012] Preferably, an installation hole is provided on one side of the main body of the coal mill, and a rubber anti-slip pad is provided on the outer side of the sliding limit block.

[0013] Preferably, the inner side of the temperature measuring circuit board is provided with a thermocouple temperature sensor, a signal transmission line, a data acquisition module and a microprocessor.

[0014] Preferably, threaded holes are provided on the front and rear sides of the temperature measuring box and the air filter plate, and the air filter plate bolts are installed inside the threaded holes.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) The coal mill roller bearing temperature measuring device of this utility model has an installation hole on the upper part of the coal mill body, and the connecting cylinder is inserted into the inner side of the installation hole. The second motor drives the worm to drive the worm wheel. After the worm wheel rotates, it can drive the double screw to rotate. After the double screw rotates, it can drive the sliding plate and the sliding limit block of Lecong to slide through the thread engagement. After the sliding limit block slides out from the inner side of the connecting cylinder, it can abut against the coal mill body, so that the temperature measuring box can be locked on the upper part of the coal mill body through the engagement of the connecting cylinder and the sliding limit block, making the temperature measuring box easier and faster to disassemble and replace later.

[0017] This utility model discloses a coal mill roller bearing temperature measuring device. It controls a first motor to drive the drive shaft and fan blades to rotate, allowing airflow from the inside of the coal mill body to be blown into the temperature measuring box. A filter plate is installed on the outside of the temperature measuring box to block debris. A thermocouple temperature sensor above the temperature measuring circuit board can detect the airflow temperature. After the drive shaft rotates, it can drive the gear ring and rotating cylinder to rotate through the cooperation of the transmission gear. After the rotating cylinder rotates, it can drive the filter holes to absorb cleaning cotton to wipe and clean the filter plate, so that the top of the filter plate will not be blocked by debris. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of 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.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the coal mill roller bearing temperature measuring device proposed in this utility model;

[0020] Figure 2 This is a partial three-dimensional structural diagram of the temperature measuring box and air filter plate proposed in this utility model.

[0021] Figure 3 This is a partial three-dimensional structural diagram of the temperature measuring box and fan blades proposed in this utility model.

[0022] Figure 4 This is a three-dimensional structural diagram of the explosive portion of the coal mill roller bearing temperature measuring device proposed in this utility model.

[0023] Figure 5 This is a partial three-dimensional structural diagram of the coal mill roller bearing temperature measuring device proposed in this utility model.

[0024] In the diagram: 1. Main body of the coal mill; 2. Connecting cylinder; 3. Sliding limit block; 4. Temperature measuring box; 5. Air filter plate; 6. Temperature measuring circuit board; 7. First motor; 8. Drive shaft; 9. Fan blade; 10. Rotating shaft; 11. Transmission gear; 12. Rotating cylinder; 13. Gear ring; 14. Filter hole adsorbing cleaning cotton; 15. Mounting plate; 16. Two-way lead screw; 17. Limiting rod; 18. Sliding plate; 19. Second motor; 20. Worm gear; 21. Worm wheel. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] refer to Figure 1-5 The coal mill roller bearing temperature measuring device includes a coal mill body 1, a connecting cylinder 2 on one side of the coal mill body 1, multiple sliding limit blocks 3 slidably installed on the inner side of the connecting cylinder 2, a temperature measuring box 4 fixedly installed on one side of the connecting cylinder 2, air filter plates 5 fixedly installed on the front and rear sides of the temperature measuring box 4, a temperature measuring circuit board 6 fixedly installed on one side of the air filter plate 5, a first motor 7 fixedly installed on one side of the air filter plate 5, a drive shaft 8 fixedly installed at the output end of the first motor 7, and fan blades 9 fixedly installed on the outer side of the drive shaft 8; the temperature measuring circuit board 6 uses a high-precision thermocouple temperature sensor, which has the advantages of fast response speed, high measurement accuracy, and good stability. Advantages include the ability to quickly and accurately detect changes in the temperature of the grinding roller bearing; the sensor's measurement accuracy can reach ±0.5℃, meeting the requirements of the coal mill for precise monitoring of bearing temperature; in this embodiment, a rotating shaft 10 is rotatably installed on one side of the filter plate 5, and a transmission gear 11 is fixedly installed on the outer side of the rotating shaft 10 and the drive shaft 8, with two adjacent transmission gears 11 meshing; a rotating cylinder 12 is rotatably installed on the inner side of the connecting cylinder 2, and a gear ring 13 is fixedly installed on the inner side of the rotating cylinder 12, with the transmission gear 11 and the gear ring 13 meshing; a filter hole adsorption cleaning cotton 14 is fixedly installed on one side of the rotating cylinder 12, and the filter hole adsorption cleaning cotton 14 is in contact with the filter plate 5.

[0027] In this embodiment, two mounting plates 15 are fixedly installed on the inner side of the connecting cylinder 2. A bidirectional lead screw 16 is rotatably installed on the inner side of the mounting plate 15. A limit rod 17 is fixedly installed on the inner side of the mounting plate 15. Two sliding plates 18 are threadedly installed on the outer side of the bidirectional lead screw 16. The sliding plates 18 are slidably installed on the outer side of the limit rod 17. A sliding limit block 3 is fixedly installed on one side of the sliding plate 18. After the drive shaft 8 rotates, it can drive the gear ring 13 and the rotating cylinder 12 to rotate through the cooperation of the transmission gear 11. After the rotating cylinder 12 rotates, it can drive the filter hole adsorption cleaning cotton 14 to wipe and clean the filter plate 5, so that the filter plate 5 will not be stuck and blocked by debris. In this embodiment, a second motor 19 is fixedly installed on one side of the inner wall of the connecting cylinder 2. A worm gear 20 is fixedly installed at the output end of the second motor 19. A worm wheel 21 is fixedly installed on the outer side of the bidirectional lead screw 16. The worm gear 20 and the worm wheel 21 mesh with each other.

[0028] In this embodiment, multiple through slots are provided on the outer side of the connecting cylinder 2, and the sliding limit block 3 is slidably installed on the inner side of the through slots. In this embodiment, an installation hole is provided on one side of the coal mill body 1, and a rubber anti-slip pad is provided on the outer side of the sliding limit block 3. The connecting cylinder 2 is inserted into the inner side of the installation hole, and the second motor 19 is controlled to drive the worm gear 20 to drive the worm wheel 21. After the worm wheel 21 rotates, it can drive the bidirectional screw 16 to rotate. After the bidirectional screw 16 rotates, it can drive the sliding plate 18 and the sliding limit block 3 to slide through the threaded engagement. After the sliding limit block 3 slides out from the inner side of the connecting cylinder 2, it can abut against the coal mill body 1, so that the temperature measuring box 4 can be locked on the top of the coal mill body 1 through the engagement of the connecting cylinder 2 and the sliding limit block 3, making the later disassembly and replacement of the temperature measuring box 4 more convenient and quick.

[0029] In this embodiment, a thermocouple temperature sensor, a signal transmission line, a data acquisition module, and a microprocessor are arranged on the inner side of the temperature measuring circuit board 6. A data acquisition module is also arranged on the top of the temperature measuring circuit board 6. It adopts a high-performance analog-to-digital converter chip, which can quickly convert the analog signal output by the temperature sensor into a digital signal and perform preliminary data processing and calibration. The acquisition module has high-speed sampling capability and can perform multiple temperature data acquisitions per second to ensure timely capture of changes in bearing temperature. In this embodiment, threaded holes are opened on the front and rear sides of the temperature measuring box 4 and the air filter plate 5. The air filter plate 5 is bolted to the inner side of the threaded holes. The threaded holes facilitate the installation of the air filter plate 5 on the top of the temperature measuring box 4 and make it easy to replace the air filter plate 5.

[0030] The implementation principle of the coal mill roller bearing temperature measuring device in this embodiment is as follows: An installation hole is provided above the coal mill body 1, and the connecting cylinder 2 is inserted into the inner side of the installation hole. The second motor 19 is controlled to drive the worm gear 20 to drive the worm wheel 21. After the worm wheel 21 rotates, it can drive the bidirectional screw 16 to rotate. After the bidirectional screw 16 rotates, it can drive the sliding plate 18 and the sliding limit block 3 to slide through the thread engagement. After the sliding limit block 3 slides out from the inner side of the connecting cylinder 2, it can abut against the coal mill body 1, so that the temperature measuring box 4 can be locked above the coal mill body 1 through the engagement of the connecting cylinder 2 and the sliding limit block 3, making the temperature measuring box 4 easier and faster to disassemble and replace later.

[0031] The first motor 7 drives the drive shaft 8 and fan blades 9 to rotate, allowing the airflow inside the coal mill body 1 to be blown into the temperature measuring box 4. A filter plate 5 is installed on the outside of the temperature measuring box 4, which can block debris. The thermocouple temperature sensor above the temperature measuring circuit board 6 can detect the airflow temperature. After the drive shaft 8 rotates, it can drive the gear ring 13 and the rotating cylinder 12 to rotate through the cooperation of the transmission gear 11. After the rotating cylinder 12 rotates, it can drive the filter holes to absorb cleaning cotton 14 to wipe and clean the filter plate 5, so that the filter plate 5 will not be stuck and blocked by debris.

[0032] The temperature measuring circuit board 6 uses a high-precision thermocouple temperature sensor. Thermocouples have advantages such as fast response speed, high measurement accuracy, and good stability, enabling them to quickly and accurately sense changes in the temperature of the grinding roller bearing. The sensor's measurement accuracy can reach ±0.5℃, meeting the requirements of precise bearing temperature monitoring in coal mills. Shielded twisted-pair cable is used as the temperature signal transmission line. The shielding layer effectively shields against external electromagnetic interference, ensuring the accuracy and stability of the temperature signal during transmission. A signal transmission line is located on top of the temperature measuring circuit board 6. The core of the transmission line is made of high-purity copper, which has low resistance characteristics, reducing signal attenuation during transmission. An anti-interference module is connected in series on the signal transmission line. The anti-interference module integrates filtering circuits and isolation circuits. The filtering circuit can filter out high-frequency noise and spurious waves in the signal, while the isolation circuit... The sensor is electrically isolated from the subsequent signal processing unit to prevent external interference signals from entering the signal transmission line through the power supply or other means. A data acquisition module is also located above the temperature measuring circuit board 6. This module uses a high-performance analog-to-digital converter chip to quickly convert the analog signal output by the temperature sensor into a digital signal and perform preliminary data processing and calibration. The acquisition module has high-speed sampling capability, capable of acquiring temperature data multiple times per second, ensuring timely detection of bearing temperature changes. The microprocessor, as the core of the data processing module, analyzes, calculates, and stores the acquired temperature data. The microprocessor incorporates advanced algorithms to perform real-time trend analysis of the temperature data, determining whether the bearing temperature is within the normal range. When the temperature is abnormal, the microprocessor can quickly issue an alarm signal.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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 the present invention. 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 may be combined in any suitable manner in one or more embodiments or examples.

[0034] The above provides a detailed description of the coal mill roller bearing temperature measuring device provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A temperature measuring device for a bearing of a coal mill roller, characterized in that, Include: The coal mill body (1), one side of the coal mill body (1) is provided with a connecting barrel (2), a plurality of sliding limit blocks (3) are slidingly installed on the inner side of the connecting barrel (2), a temperature measuring box (4) is fixedly installed on one side of the connecting barrel (2), filter plates (5) are fixedly installed on the front and back of the temperature measuring box (4), a temperature measuring circuit board (6) is fixedly installed on one side of the filter plate (5), a first motor (7) is also fixedly installed on one side of the filter plate (5), a drive shaft (8) is fixedly installed on the output end of the first motor (7), and a fan blade (9) is fixedly installed on the outer side of the drive shaft (8).

2. The bearing temperature measuring device for the coal mill roller shaft according to claim 1, characterized in that, A rotating shaft (10) is rotatably installed on one side of the filter plate (5), transmission gears (11) are fixedly installed on the outer sides of the rotating shaft (10) and the drive shaft (8), adjacent two transmission gears (11) are engaged, a rotating barrel (12) is rotatably installed on the inner side of the connecting barrel (2), a gear ring (13) is fixedly installed on the inner side of the rotating barrel (12), the transmission gears (11) and the gear ring (13) are engaged, and filter hole adsorbing cleaning cotton (14) is fixedly installed on one side of the rotating barrel (12). The filter hole adsorbing cleaning cotton (14) is attached to the filter plate (5).

3. The coal mill roller bearing temperature measuring device according to claim 1, characterized in that, Two mounting plates (15) are fixedly installed on the inner side of the connecting barrel (2), a bidirectional screw rod (16) is rotatably installed on the inner side of the mounting plate (15), a limiting rod (17) is fixedly installed on the inner side of the mounting plate (15), two sliding plates (18) are threadedly installed on the outer side of the bidirectional screw rod (16), the sliding plates (18) are slidingly installed on the outer side of the limiting rod (17), and the sliding limit blocks (3) are fixedly installed on one side of the sliding plate (18).

4. The coal mill roller bearing temperature measuring device according to claim 3, characterized in that, A second motor (19) is fixedly installed on the inner wall of one side of the connecting barrel (2), a worm (20) is fixedly installed on the output end of the second motor (19), a worm wheel (21) is fixedly installed on the outer side of the bidirectional screw rod (16), and the worm (20) and the worm wheel (21) are engaged.

5. The coal mill roller bearing temperature measuring device according to claim 1, characterized in that, A plurality of through grooves are formed on the outer side of the connecting barrel (2), and the sliding limit blocks (3) are slidingly installed in the through grooves.

6. The coal mill roller bearing temperature measuring device according to claim 1, characterized in that, An installation hole is formed on one side of the coal mill body (1), and a rubber antiskid pad is arranged on the outer side of the sliding limit block (3).

7. The coal mill roller bearing temperature measuring device according to claim 1, characterized in that, A thermocouple temperature sensor, a signal transmission line, a data acquisition module and a microprocessor are arranged on the inner side of the temperature measuring circuit board (6).

8. The coal mill roller bearing temperature measuring device according to claim 1, characterized in that, Threaded holes are formed on the front and back of the temperature measuring box (4) and the filter plate (5), and the filter plate (5) is bolted to the inner side of the threaded hole.

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