A real-time monitoring device for cold-pressing of a roller shaft head of a roller mill
By installing a real-time monitoring device with pressure sensors and signal transmission units on the roller mill, the problem of lack of data during the pressing process of the grinding roller shaft head is solved, ensuring assembly quality, preventing the grinding roller body from cracking and the shaft head from falling off, and providing reliable data support.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- COFCO ENG EQUIP ZHANGJIAKOU
- Filing Date
- 2026-04-21
- Publication Date
- 2026-07-03
AI Technical Summary
In the existing technology, the room temperature pressing process of the grinding roller shaft head of the roller mill lacks reliable data evaluation, which leads to the assembly not meeting the fastening requirements and is prone to problems such as cracking of the grinding roller body or detachment of the shaft head.
A real-time monitoring device for room temperature pressing of the roller head of a roller mill is adopted. The device uses pressure sensors and signal transmission units to monitor the pressure changes during the pressing process in real time. The data is recorded by the host computer and alarms are triggered to indicate abnormalities, ensuring that the interference fit and surface roughness meet the design requirements.
It enables real-time monitoring and data recording of the grinding roller head pressing process, ensuring assembly quality, preventing grinding roller body cracking and shaft head detachment, and providing reliable data support to improve the assembly process.
Smart Images
Figure CN122329643A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of grinding mills, and more particularly to a real-time monitoring device for the normal temperature pressing of the grinding roller shaft head of a roller mill. Background Technology
[0002] like Figure 1 As shown, currently, the grinding roller head of a roller mill is typically assembled into the inner hole at the end of the roller body using a room-temperature pressing method. The inner holes at the ends of the grinding roller head 8 and the roller body 9 are interference-fitted, forming elastic pressure after assembly to achieve fastening and transmit working torque. However, there is no reliable data to evaluate whether the assembly meets the fastening requirements during the pressing process of the grinding roller head 8. Currently, the pressing force can only be visually observed through the pressure gauge of the press, and whether the requirements are met is judged based on experience. Because the pressure during the pressing process is variable and the pressing time is short, the data cannot be accurately recorded, and even the complete pressure change and maximum pressure value cannot be seen. The lack of pressing process data makes it impossible to trace quality problems that arise later in use. Summary of the Invention
[0003] Based on the above problems, the purpose of this invention is to provide a real-time monitoring device for the room temperature pressing of the grinding roller head of a roller mill, which solves the problems of excessive local pressure causing the grinding roller body to crack due to differences in interference fit, changes in surface roughness, and pressure deviation during room temperature pressure assembly of the grinding roller head of a roller mill, as well as the problem of the roller head falling off during later use due to insufficient interference fit.
[0004] The present invention adopts the following technical solution: This invention provides a real-time monitoring device for the ambient temperature pressing of the roller head of a roller mill, comprising a detection box frame, a sleeve hole that mates with the roller body on the detection box frame, and a plurality of pre-pressing mechanisms arranged in a ring around the sleeve hole on the detection box frame. The tightening end of each pre-pressing mechanism is located in the sleeve hole, and a pressure sensor is provided at the tightening end of the pre-pressing mechanism. A force-bearing body is provided on the pressure-receiving side of the pressure sensor, and the force-bearing body is pressed against the outer circumferential surface of the roller body. The pressure sensor is connected to a host computer via a signal transmission unit.
[0005] Preferably, the signal transmission unit includes a transmitter, a wireless communication transmitting module, and a wireless communication receiving module; The transmitter and the wireless communication transmission module are both mounted on the detection box frame; The pressure sensor transmits an electrical signal to the transmitter, which processes the signal and outputs an analog signal to the wireless communication transmitting module. The wireless communication transmitting module transmits the analog signal to the wireless communication receiving module, and finally the pressure data is sent to the host computer. The host computer displays the pressure data and records the pressure value.
[0006] Preferably, two pre-compression mechanisms are arranged around the sleeve hole on the detection box frame, and the two pre-compression mechanisms are at a 90-degree angle to each other.
[0007] Preferably, the system also includes a press, which includes a support base, with hydraulic cylinders installed at both ends of the support base. A digital pressure gauge is installed on the oil supply line of the hydraulic cylinder, and the digital pressure gauge is electrically connected to the host computer.
[0008] Preferably, the pre-compression mechanism includes a force-applying rod, the operating end of which is provided with a wave-shaped handle, and the outer wall of the force-applying rod is provided with threads. A through hole is opened on the detection box frame, and a hexagonal nut is welded to the through hole. The force-applying rod is threadedly connected to the hexagonal nut. The tightening end of the force-applying rod is provided with a bearing limit seat, a thrust ball bearing, and an elastic retaining ring in sequence. The pressure sensor is located between the thrust ball bearing and the elastic retaining ring.
[0009] Preferably, a limit ring is provided on the force-applying rod, and the bearing limit seat abuts against the limit ring.
[0010] Preferably, the pressure sensor is annular, and multiple mounting holes are provided around the pressure sensor. The force-bearing body is connected to the mounting holes on the pressure sensor by multiple bolts.
[0011] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention can monitor the pressure change curve during the pressing process of the shaft head in real time and record the pressing time and process data completely. It can also record the change in the expansion of the outer surface of the shaft head after the inner wall of the grinding roller is subjected to interference pressure during the pressing process. When the pressure exceeds or falls below the set threshold, an alarm is triggered to prompt the operator to re-check whether the interference fit and surface roughness meet the design requirements, and to check for foreign objects on the mating surface to determine the cause of the abnormality. This provides reliable and complete data for subsequent quality problems and continuous improvement, filling the gap in the field of grinding roller shaft head pressing without reliable data support. Attached Figure Description
[0012] The present invention will be further described below with reference to the accompanying drawings.
[0013] Figure 1 This is a schematic diagram of the structure of the grinding rollers in a roller mill. Figure 2 This is a schematic diagram of the main structure of the real-time monitoring device for the ambient temperature pressing of the roller mill shaft head in the present invention; Figure 3 This is a side view of the detection box frame of the present invention; Figure 4 This is a schematic diagram of the installation structure of the pre-compression mechanism, the force-bearing body, and the pressure sensor of the present invention; Figure 5This is a schematic diagram of the real-time monitoring device for the normal temperature pressing of the roller mill shaft head in the present invention.
[0014] Explanation of reference numerals in the attached drawings: 1. Detection box frame; 2. Pre-compression mechanism; 201. Force application rod; 202. Wave-shaped handle; 203. Hexagonal nut; 204. Bearing limit seat; 205. Thrust ball bearing; 206. Elastic retaining ring; 207. Limiting retaining ring; 3. Force-bearing body; 4. Pressure sensor; 5. Signal transmission unit; 501. Transmitter; 502. Wireless communication transmitting module; 503. Wireless communication receiving module; 6. Host computer; 7. Press; 701. Support seat; 702. Hydraulic cylinder; 703. Digital pressure gauge; 8. Grinding roller shaft head; 9. Roller body. Detailed Implementation
[0015] To make the technical problems, technical solutions, and beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0016] like Figures 2 to 4 As shown in the figure, this embodiment discloses a real-time monitoring device for the ambient temperature pressing of the roller head of a roller mill, including a detection box frame 1. The detection box frame 1 is provided with a sleeve hole 101 that cooperates with the roller body 9. Multiple pre-pressing mechanisms 2 are arranged in a ring around the sleeve hole 101 on the detection box frame 1. The top end of the pre-pressing mechanism 2 is located in the sleeve hole 101, and a pressure sensor 4 is provided at the top end of the pre-pressing mechanism 2. A force receiving body 3 is provided on the pressure receiving side of the pressure sensor 4, and the force receiving body 3 is pressed against the outer circular surface of the roller body 9.
[0017] Specifically, the pre-compression mechanism 2 includes a force-applying rod 201. The operating end of the force-applying rod 201 is provided with a wave-shaped handle 202. The outer wall of the force-applying rod 201 is provided with threads. A through hole is opened on the detection box frame 1. A hexagonal nut 203 is welded to the through hole. The force-applying rod 201 is threadedly connected to the hexagonal nut 203. The tightening end of the force-applying rod 201 is provided with a bearing limit seat 204, a thrust ball bearing 205 and an elastic retaining ring 206 in sequence.
[0018] The pressure sensor 4 is located between the thrust ball bearing 205 and the elastic retaining ring 206. The bearing limit seat 204, the thrust ball bearing 205 and the pressure sensor 4 are all annular. After the three are sequentially fitted onto the force application rod 201, the elastic retaining ring 206 is engaged with the end of the force application rod 201 to prevent the pressure sensor 4 from coming off.
[0019] In this embodiment, a limiting ring 207 is provided on the force-applying rod 201, and the bearing limiting seat 204 abuts against the limiting ring 207.
[0020] In this embodiment, the pressure sensor 4 is ring-shaped, and multiple mounting holes are provided around the pressure sensor 4. The force receiving body 3 is located below the pressure sensor 4, and the force receiving body 3 is connected to the mounting holes on the pressure sensor 4 by multiple bolts.
[0021] Pressure sensor 4 is connected to host computer 6 via signal transmission unit 5. Signal transmission unit 5 includes transmitter 501, wireless communication transmitter module 502, and wireless communication receiver module 503. Transmitter 501 and wireless communication transmitter module 502 are both mounted on the detection box frame 1.
[0022] Pressure sensor 4 transmits an electrical signal to transmitter 501. Transmitter 501 processes the signal and outputs an analog signal to wireless communication transmitter module 502. Wireless communication transmitter module 502 transmits the analog data to wireless communication receiver module 503. Finally, the pressure data is sent to host computer 6, which displays and records the pressure value. In this embodiment, the host computer includes a 12-24 channel analog data recorder, capable of recording sensor data acquired in analog electrical signals such as 4-20mA, 0-5V, 0-10V, ±10V, Pt100, and Pt1000. The host computer is equipped with a USB interface and a 485 communication port, allowing the recorded data to be uploaded to a computer via USB flash drive or communication. The acquired data is then analyzed using analysis software DTM 2.0.2. The host computer and the corresponding analysis software are existing technologies, and those skilled in the art can purchase existing products.
[0023] In this embodiment, two pre-compression mechanisms 2 are arranged around the sleeve hole 101 on the detection box frame 1, and the two pre-compression mechanisms 2 are at a 90-degree angle to each other.
[0024] In this embodiment, a press 7 is also included. The press 7 includes a support 701. Both ends of the support 701 are provided with oil cylinders 702. A digital pressure gauge 703 is installed on the oil supply line of the oil cylinder 702. The digital pressure gauge 703 is electrically connected to the host computer 6.
[0025] like Figure 5 As shown, the operation process of this invention is as follows: The grinding roller shaft head 8 is pre-installed into the inner hole at the end of the roller body 9 with a clearance fit, and the installation length is 60±10mm. The pre-installed grinding roller is hoisted to the pressing position of the support 701, and the detection box frame 1 is fitted onto the end position of the grinding roller. Then, the two pre-pressing mechanisms 2 are alternately pressed, so that the force-bearing body 3 presses against the outer surface of the roller body 9. The force-bearing body 3 is subjected to the reaction force of the roller body 9 surface, which acts on the pressure sensor 4. The pressure sensor 4 transmits an electrical signal to the transmitter 501. The transmitter 501 processes the data and outputs a 4-20mA analog signal to the wireless communication transmitter module 502. The wireless communication transmitter module 502 transmits the analog data to the wireless communication receiver module 503. Finally, the pressure data is sent to the host computer 6, which displays the pressure data and records the current pressure value.
[0026] Before pressing the grinding roller head 8, alternately adjust the two pre-pressing mechanisms 2 to make its initial pressure value 10000±20N. Check the pressure value of the digital pressure gauge 703, which is generally less than 0.05Mpa. Start the hydraulic cylinder 702 of the press 7 to extend and press the grinding roller head 8 into the roller body 9.
[0027] The host computer 6 reads data from the digital pressure gauge 703 and pressure sensor 4 once per second (the reading interval can be set). During the process of the grinding roller head 8 pressing into the roller body 9, the roller body 9 undergoes microscopic deformation due to the reaction force of the interference fit, and the pressure sensor 4 outputs an electrical signal under the force. The host computer 6 records and analyzes the data of the grinding roller head 8 pressing into the roller body in real time, outputting the actual pressure data of the grinding roller head pressing into the roller body, as well as the process change curve of the roller body's outer surface expansion after pressing into the roller head. When the pressure exceeds or falls below the set threshold, an alarm prompts the operator to re-check whether the interference fit and surface roughness meet the design requirements, and to investigate foreign objects on the mating surface to determine the cause of the abnormality. This provides reliable and complete data for future quality problems and continuous improvement.
[0028] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims
1. A real-time monitoring device for the ambient temperature pressing of the grinding roller shaft head of a roller mill, characterized in that: The device includes a detection box frame (1), which has a sleeve hole (101) that mates with the roller body (9). Multiple pre-pressing mechanisms (2) are arranged in a ring around the sleeve hole (101) on the detection box frame (1). The top end of the pre-pressing mechanism (2) is located in the sleeve hole (101), and the top end of the pre-pressing mechanism (2) is provided with a pressure sensor (4). The pressure sensor (4) has a force-bearing body (3) on its pressure-bearing side, and the force-bearing body (3) is pressed against the outer circular surface of the roller body (9). The pressure sensor (4) is connected to the host computer (6) via the signal transmission unit (5).
2. The real-time monitoring device for ambient temperature pressing of the roller mill shaft head as described in claim 1, characterized in that: The signal transmission unit (5) includes a transmitter (501), a wireless communication transmitting module (502), and a wireless communication receiving module (503). The transmitter (501) and the wireless communication transmission module (502) are both mounted on the detection box frame (1); The pressure sensor (4) transmits an electrical signal to the transmitter (501). The transmitter (501) performs signal amplification processing and outputs an analog signal to the wireless communication transmitting module (502). The wireless communication transmitting module (502) transmits the analog data to the wireless communication receiving module (503). Finally, the pressure data is sent to the host computer (6). The host computer (6) displays the pressure data and records the pressure value.
3. The real-time monitoring device for ambient temperature pressing of the roller mill shaft head as described in claim 1, characterized in that: Two pre-compression mechanisms (2) are arranged around the sleeve hole (101) on the detection box frame (1), and the two pre-compression mechanisms (2) are at a 90-degree angle to each other.
4. The real-time monitoring device for ambient temperature pressing of the roller mill shaft head as described in claim 1, characterized in that: It also includes a press (7), which includes a support (701), and both ends of the support (701) are provided with oil cylinders (702). A digital pressure gauge (703) is installed on the oil supply line of the oil cylinder (702), and the digital pressure gauge (703) is electrically connected to the host computer (6).
5. The real-time monitoring device for ambient temperature pressing of the roller mill shaft head as described in claim 1, characterized in that: The pre-compression mechanism (2) includes a force-applying rod (201), the operating end of which is provided with a wave handle (202), the outer wall of which is provided with a thread, a through hole is opened on the detection box frame (1), a hexagonal nut (203) is welded at the through hole, the force-applying rod (201) is threadedly connected to the hexagonal nut (203), and the top end of the force-applying rod (201) is provided with a bearing limit seat (204), a thrust ball bearing (205) and an elastic retaining ring (206) in sequence; the pressure sensor (4) is located between the thrust ball bearing (205) and the elastic retaining ring (206).
6. The real-time monitoring device for ambient temperature pressing of the roller mill shaft head as described in claim 5, characterized in that: The force-applying rod (201) is provided with a limit ring (207), and the bearing limit seat (204) abuts against the limit ring (207).
7. The real-time monitoring device for ambient temperature pressing of the roller mill shaft head as described in claim 5, characterized in that: The pressure sensor (4) is ring-shaped, and multiple mounting holes are provided around the pressure sensor (4). The force-bearing body (3) is connected to the mounting holes on the pressure sensor (4) by multiple bolts.