Axial displacement and rotating speed monitoring system for reduction gearbox of double-screw extruder

Abstract

The utility model relates to a twin-screw extruder reduction gearbox axial displacement and rotating speed monitoring system, and relates to the field of twin-screw extruder monitoring technology, the twin-screw extruder reduction gearbox axial displacement and rotating speed monitoring system comprises a box body, an input shaft, an intermediate shaft and an output shaft, the input shaft, the intermediate shaft and the output shaft are all installed in the box body, the input shaft is in engaged transmission connection with the intermediate shaft, and the output shaft is in engaged transmission connection with the intermediate shaft. The output shaft comprises a first output shaft and a second output shaft, the first output shaft is in meshing transmission with the intermediate shaft, the first output shaft and the second output shaft are in meshing transmission through a transition shaft, the first displacement sensor is installed on one side of the first output shaft, and a probe points to the output shaft; the second displacement sensor is installed on one side of the second output shaft, a probe points to the middle shaft, the rotating speed sensor is installed on one side of the input shaft, and a probe faces the input shaft. The reduction gearbox has the effect of prolonging the service life of the internal structure of the reduction gearbox.

Description

Technical Field

[0001] The present application relates to the field of twin-screw extruder monitoring technology, and in particular to a twin-screw extruder reducer axial displacement and speed monitoring system. Background Art

[0002] The twin-screw extruder reducer is an important component of the extruder. It is responsible for converting the high-speed rotation of the motor into low-speed, high-torque rotation of the screw to meet the needs of the extrusion process. It is widely used in plastic processing, rubber processing, food processing and other fields.

[0003] In order to ensure the working condition of the twin-screw extruder and avoid problems such as equipment damage and performance degradation, it is necessary to monitor the reduction gearbox and twin-screw main unit throughout their life cycle to ensure that the reduction gearbox and twin-screw main unit are in good working condition and improve the overall efficiency of the production line.

[0004] Existing twin-screw extruder reducer axial displacement and speed monitoring systems usually monitor the vibration of the gearbox and the temperature of the bearings. These systems often only detect wear and tear of the reducer's internal structure, making it impossible to provide early warning to extend the service life of the reducer's internal structure. Utility Model Content

[0005] In order to extend the service life of the internal structure of the reduction gearbox, the present application provides an axial displacement and speed monitoring system for a twin-screw extruder reduction gearbox.

[0006] The present application provides a twin-screw extruder reduction box axial displacement and speed monitoring system that adopts the following technical solutions:

[0007] A twin-screw extruder reduction gearbox axial displacement and speed monitoring system includes a housing, an input shaft, an intermediate shaft, and an output shaft, wherein the input shaft, intermediate shaft, and output shaft are all mounted in the housing, the input shaft meshingly connected to the intermediate shaft, the output shaft including a first output shaft and a second output shaft, the first output shaft meshingly connected to the intermediate shaft, and the first output shaft meshingly connected to the second output shaft via a transition shaft, and further includes a first displacement sensor, a second displacement sensor, and a speed sensor, wherein the first displacement sensor is mounted on one side of the first output shaft, with a probe pointing toward the output shaft, and the second displacement sensor is mounted on one side of the second output shaft, with a probe pointing toward the intermediate shaft.

[0008] By adopting the above technical solution, the first displacement sensor is installed on the first output shaft side, and the second displacement sensor is installed on the second output shaft side. The offset values ​​of the first output shaft and the second output shaft in the reduction gear box are monitored in real time by the first displacement sensor and the second displacement sensor. Then, by comparing the position data between the two outputs, it is determined whether the first output shaft and the second output shaft are offset. Then, the speed of the input shaft is monitored by the speed sensor installed on the input shaft side, thereby monitoring the speed of the twin-screw main unit. The predetermined values ​​of the first displacement sensor, the second displacement sensor and the speed sensor are set by the control system, and a part of the predetermined values ​​is reserved. Therefore, when the offset value of the intermediate shaft and the output shaft is too large or the output shaft speed is too fast, the system will issue an early warning and shut down the machine when necessary, and perform maintenance in time to extend the service life of the internal structure of the reduction gear box.

[0009] In a specific possible implementation scheme, the first displacement sensor is installed on the side wall of the box adjacent to one end of the first output shaft, and the probe extends through the side wall into the box and points to the axis center of the first output shaft. The second displacement sensor is installed at one end of the second output shaft located in the box, and the probe points to the axis center of the output shaft.

[0010] By adopting the above technical solution, comprehensive monitoring of the rotational speed of the axial displacement input shaft of the first and second output shafts of the twin-screw extruder reduction gearbox is achieved. Specifically, the first displacement sensor is installed on the side wall of the box body adjacent to one end of the first output shaft, and the probe extends through the side wall into the box body and points to the axis center of the intermediate shaft, which can effectively detect the axial displacement of the first output shaft. At the same time, the second displacement sensor is installed at one end of the second output shaft within the box body, and the probe is set to point to the axis center of the output shaft, which can effectively detect the axial displacement of the second output shaft. The detected data is then compared with the set values ​​of the originally installed first and second output shafts to determine the axial displacement deviation between the first and second output shafts.

[0011] In a specific possible implementation scheme, a first mounting bracket is installed on the side wall of the box body adjacent to one end of the intermediate shaft, the second displacement sensor is installed on the first mounting bracket, and the probe extends through the side wall into the box body and is set to point to the axis center of the intermediate shaft.

[0012] In a specific possible implementation scheme, the first displacement sensor is mounted on the side wall of the box, and the probe extends through the side wall into the box and points to the axis of the first displacement sensor; the second displacement sensor is mounted on the side wall of the box, and the probe extends through the side wall of the box and points to the surface of the second output shaft.

[0013] By adopting the above-mentioned technical solution, real-time monitoring of the axial displacement of the first and second output shafts and the speed of the input shaft of the twin-screw extruder reduction gearbox is achieved. Specifically, the first displacement sensor is installed on the side wall of the box body. The probe extends through the side wall into the box body and points to the center position of the first output shaft, which can accurately detect changes in the axial displacement of the first output shaft. The second displacement sensor is also installed on the side wall of the box body. The probe passes through the side wall of the box body and points to the surface of the second output shaft, which can accurately measure the axial displacement of the second output shaft. This arrangement makes the sensor installation of the monitoring system more reasonable, improves the monitoring accuracy and reliability, and helps to promptly detect potential problems inside the reduction gearbox, preventing equipment damage and reduced production efficiency.

[0014] In a specific embodiment, a second mounting bracket is installed on the side wall of the box adjacent to the second output shaft, the second displacement sensor is installed on the second mounting bracket, and the probe passes through the side wall of the box and points to the surface of the second output shaft.

[0015] In a specific possible implementation scheme, an auxiliary plate is further included, and the auxiliary plate is sleeved on the output shaft. The second displacement sensor is installed in the box through a mounting plate and is arranged toward the end surface of the auxiliary plate.

[0016] By adopting the above technical solution, the auxiliary plate is installed on the output shaft, the first displacement sensor is installed in the box through the mounting plate and is set to point to the end face of the auxiliary plate, and the speed sensor is set to point to the side of the auxiliary plate, so that the distance between the two is close, and the two work together to further ensure the safety of the reduction gearbox during operation.

[0017] In a specific implementation manner, the first displacement sensor is installed on one side of the first output shaft.

[0018] In a specific possible implementation scheme, the auxiliary plate is configured as a circular plate, and the auxiliary plate is coaxially disposed with the output shaft.

[0019] By adopting the above technical solution, the auxiliary plate is set as a circular plate and is set coaxially with the output shaft, which improves the accuracy and stability of the monitoring system, effectively reduces the measurement error caused by the deformation or position offset of the auxiliary plate itself, and thus improves the reliability and accuracy of the entire monitoring system.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. The first and second displacement sensors monitor the offset between the first and second output shafts in the reduction gearbox in real time. A speed sensor installed on both sides of the input and output shafts monitors the speed of the input shaft, thereby monitoring the speed of the twin-screw extruder. The control system sets predetermined values ​​for the first, second, and speed sensors, with some reserve provisions. This allows the system to issue an early warning if the offset between the intermediate and output shafts is excessive, or if the output shaft speed is too high. The system then shuts down the machine if necessary for timely maintenance, extending the service life of the reduction gearbox's internal structure.

[0022] 2. The auxiliary plate is installed on the output shaft, and the first displacement sensor is installed in the box through the mounting plate and is set to point to the end face of the auxiliary plate. The speed sensor is set to point to the side of the auxiliary plate. This allows the two to be close to each other and work together to further ensure the safety of the reduction gearbox during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a cross-sectional view of Example 1 of the present application.

[0024] Figure 2 for Figure 1 Enlarged view of part A.

[0025] Figure 3 for Figure 1 Magnified view of part B.

[0026] Figure 4 This is a cross-sectional view of Example 2 of the present application.

[0027] Figure 5 for Figure 4 Magnified view of part C.

[0028] Figure 6 This is a cross-sectional view of Example 1 of the present application.

[0029] Figure 7 for Figure 6 Magnified view of part D.

[0030] Explanation of the accompanying drawings: 1. Housing; 2. Input shaft; 3. Intermediate shaft; 41. First output shaft; 42. Second output shaft; 5. First displacement sensor; 6. Second displacement sensor; 7. Speed ​​sensor; 8. Auxiliary plate; 9. Mounting plate; 10. First mounting bracket; 11. Second mounting bracket. DETAILED DESCRIPTION

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0033] The embodiments of the present application disclose a twin-screw extruder reduction gearbox axial displacement and speed monitoring system.

[0034] Example 1

[0035] like Figure 1 As shown, the twin-screw extruder reduction gearbox axial displacement and speed monitoring system includes a housing 1, an input shaft 2, an intermediate shaft 3, an output shaft, a first displacement sensor 5, a second displacement sensor 6, and a speed sensor 7. The input shaft 2, the intermediate shaft 3, and the output shaft are all arranged in the housing 1, with one end of the input shaft 2 extending through a side wall of the housing 1. The input shaft 2 and the intermediate shaft 3 are connected in meshing transmission via a number of auxiliary shafts. The output shaft includes a first output shaft 41 and a second output shaft 42. The intermediate shaft 3 is meshed with the first output shaft 41 for transmission, and the second output shaft 42 is meshed with the first output shaft 41 through a transition shaft for transmission. The first displacement sensor 5 is installed on one side of the first output shaft 41, with the probe pointing to the first output shaft 41. The second displacement sensor 6 is installed on the side of the second output shaft 42, with the probe pointing to the output shaft.

[0036] In the embodiment of the present application, a speed sensor is provided, and the speed sensor 7 is installed on one side of the input shaft 2, and the probe is set toward the input shaft 2. In the embodiment of the present application, the speed sensor 7 can also be installed at the output end of the first output shaft 41 or the second output shaft 42. In other embodiments, several speed sensors can be provided, wherein one speed sensor 7 is installed on one side of the output shaft 2, and the remaining speed sensors 7 can be installed on the first output shaft 41 side or the second output shaft 42 side. By real-time monitoring of the speed of the input shaft and the output shaft side, the situation of excessive speed can be avoided.

[0037] like Figure 2As shown, a first mounting bracket 11 is provided on the first box body 1, the first displacement sensor 5 is installed in the first mounting bracket 11, and the probe extends through the side wall of the box body 1 to the interior of the box body 1 and is set toward the axis center of the first output shaft 41. The second displacement sensor 6 is installed at one end of the second output shaft 42 located in the box body 1, and the probe is set toward the axis center of one end of the second output shaft 42.

[0038] like Figure 3 As shown, an auxiliary plate 8 is also included. The auxiliary plate 8 is preferably set as a circular plate. The second output shaft 42 is set through the axis of the auxiliary plate 8, and the two are welded. The surface of the auxiliary plate 8 is set to be smooth.

[0039] The control system sets predetermined values ​​for the first displacement sensor 5, the second displacement sensor 6 and the speed sensor 7, and there is a certain reserved space between the predetermined values ​​and the limit values, so that monitoring is performed by the first displacement sensor 5, the second displacement sensor 6 and the speed sensor 7. The first displacement sensor 5 and the second displacement sensor 6 cooperate to ensure the change of the gap between the two screw structures, thereby avoiding damage to the serial thrust bearings and other bearings or gears in the box body 1. The speed sensor 7 ensures the smooth rotation of the output shaft, and can issue an early warning through the system, and shut down when necessary, and perform maintenance in time to extend the service life of the internal structure of the reduction gearbox.

[0040] The implementation principle of the axial displacement and speed monitoring system of a twin-screw extruder reducer in an embodiment of the present application is as follows: predetermined values ​​are set for the first displacement sensor 5, the second displacement sensor 6 and the speed sensor 77 through the control system, and there is a certain reserved space between the predetermined values ​​and the limit values, so that monitoring is performed by the first displacement sensor 5, the second displacement sensor 6 and the speed sensor 7. The first displacement sensor 5 and the second displacement sensor 6 cooperate to ensure the change of the gap between the two screw structures, thereby avoiding damage to the serial thrust bearings and other bearings or gears in the box body 1. The speed sensor 7 ensures the smooth rotation of the output shaft, and can issue an early warning through the system and shut down when necessary, and perform maintenance in time to extend the service life of the internal structure of the reducer.

[0041] Example 2

[0042] like Figure 4 and 5 As shown, a second mounting bracket 12 is installed on the side wall of the box body 1 adjacent to the second output shaft 42 , and the second displacement sensor 6 is installed in the second mounting bracket 12 , and the probe passes through the side wall of the box body 1 and points to the surface of the second output shaft 42 .

[0043] Example 3

[0044] like Figure 6 and 7 As shown, the first displacement sensor 5 is installed on one side of the first output shaft 41 located in the box body 1 , and the probe is arranged to point to the side surface of the first output shaft 41 .

[0045] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A twin-screw extruder reduction box axial displacement and speed monitoring system, comprising a housing (1), an input shaft (2), an intermediate shaft (3) and an output shaft, wherein the input shaft (2), the intermediate shaft (3) and the output shaft are all installed in the housing (1), the input shaft (2) and the intermediate shaft (3) are meshed and connected, the output shaft comprises a first output shaft (41) and a second output shaft (42), the first output shaft (41) and the intermediate shaft (3) are meshed and connected, and the first output shaft (41) and the second output shaft (42) are meshed and connected via a transition shaft, characterized in that: The invention also includes a first displacement sensor (5), a second displacement sensor (6) and a rotation speed sensor (7), wherein the first displacement sensor (5) is mounted on one side of the first output shaft (41), and the probe is arranged to point toward the output shaft, the second displacement sensor (6) is mounted on the second output shaft (42), and the probe is arranged to point toward the intermediate shaft (3), and the rotation speed sensor (7) is mounted on the side of the input shaft (2), and the probe is arranged to point toward the input shaft (2) or the output shaft.

2. The twin-screw extruder reduction gearbox axial displacement and speed monitoring system according to claim 1, characterized in that: The first displacement sensor (5) is mounted on a side wall of the box body (1) adjacent to one end of the first output shaft (41), and a probe extends through the side wall into the box body (1) and points to the axis center of the first output shaft (41). The second displacement sensor (6) is mounted on one end of the second output shaft (42) located in the box body (1), and the probe points to the axis center of the output shaft.

3. The twin-screw extruder reduction gearbox axial displacement and speed monitoring system according to claim 2, characterized in that: A first mounting bracket (10) is mounted on a side wall of the box (1) adjacent to one end of the first output shaft (41), and the first displacement sensor (5) is mounted on the first mounting bracket (10), with a probe extending through the side wall into the box (1) and pointing toward the axis of the first displacement sensor (5).

4. The twin-screw extruder reduction gearbox axial displacement and speed monitoring system according to claim 1, characterized in that: The first displacement sensor (5) is mounted on the side wall of the box (1), and the probe extends through the side wall into the box (1) and points to the axis of the first displacement sensor (5). The second displacement sensor (6) is mounted on the side wall of the box (1), and the probe passes through the side wall of the box (1) and points to the surface of the second output shaft (42).

5. The twin-screw extruder reduction gearbox axial displacement and speed monitoring system according to claim 4, characterized in that: A second mounting bracket (11) is installed on a side wall of the box (1) adjacent to the second output shaft (42); the second displacement sensor (6) is installed on the second mounting bracket (11), and a probe passes through the side wall of the box (1) and points to the surface of the second output shaft (42).

6. The twin-screw extruder reduction gearbox axial displacement and speed monitoring system according to claim 1, characterized in that: It also includes an auxiliary plate (8), which is sleeved on the output shaft. The second displacement sensor (6) is installed in the box body (1) through a mounting plate (9) and is arranged toward the end face of the auxiliary plate (8).

7. The twin-screw extruder reduction gearbox axial displacement and speed monitoring system according to claim 6, characterized in that: The first displacement sensor (5) is installed on one side of the first output shaft (41).

8. The twin-screw extruder reduction gearbox axial displacement and speed monitoring system according to claim 6, characterized in that: The auxiliary plate (8) is configured as a circular plate, and the auxiliary plate (8) is coaxially disposed with the output shaft.

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