Double-screw plastic extruder gearbox loading test method and system
By performing double loading tests of rated rotation speed and rated torque on the gear box of the twin-screw plastic extruder, the problem of accurate loading tests at rated power in the prior art is solved, and the reference and reliability of the test results are improved.
Patent Information
- Application Number
- CN202411867679.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-03-18
AI Technical Summary
The prior art is difficult to effectively evaluate the performance of the gearbox of the twin-screw plastic extruder through loading tests, especially the inability to achieve accurate loading tests at rated power, resulting in poor reference of the test results.
The dual loading method is adopted to perform rated speed loading tests and rated torque loading tests respectively. Through series coordination of multiple drive motors, the loading test needs for speed and torque are met.
It improves the accuracy and reliability of loading test results, can effectively obtain fault information of gearbox internal transmission parts, and provides guidance for improved design.
Smart Images
Figure CN119643134A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of gear box loading test, in particular to a gear box loading test method and system for a twin-screw plastic extruder. Background Art
[0002] At present, with the large-scale development of my country's economic construction, most plastic material manufacturers are increasingly in need of large-scale, high-speed plastic material production equipment. In the existing technology, twin-screw plastic extruders occupy a very important position in polymer processing, and their application is becoming more and more extensive. As the machinery industry develops towards high power, high efficiency, low vibration, and low noise, people have put forward higher requirements for the performance of gearboxes. Therefore, in-depth research and development of gearbox test benches have important practical application significance. Through experiments, the rationality of gearbox design, processing, manufacturing, and assembly process can be tested. In-depth analysis of the test results helps to understand and evaluate the comprehensive mechanical properties of the gearbox, and also provides reference data and design basis for simulation calculation analysts and engineering designers.
[0003] The inventors found in their research that the test system of the twin-screw plastic extruder gearbox in the prior art has at least the following disadvantages:
[0004] When the prior art performs a loading test on the gearbox of a twin-screw plastic extruder, due to the high power of the gearbox, it is impossible to use the test system to make the gearbox run at rated power for the loading test. The test results are of poor reference value, it is not easy to obtain the faults in the transmission parts inside the gearbox, and it is impossible to provide guidance for the improved design of the gearbox. Summary of the invention
[0005] The objects of the present invention include, for example, providing a twin-screw plastic extruder gearbox loading test method and system, which can improve the accuracy and reliability of the loading test results. The loading test results are highly referenceable, which is conducive to obtaining faults existing in the internal transmission parts of the gearbox and also conducive to providing guidance for the improved design of the gearbox.
[0006] The embodiments of the present invention can be implemented as follows:
[0007] In a first aspect, the present invention provides a twin-screw plastic extruder gearbox loading test method, the loading test method comprising the following steps:
[0008] Step s100, performing a rated speed loading test on the twin-screw plastic extruder gearbox;
[0009] Step s200, performing a rated torque loading test on the twin-screw plastic extruder gearbox.
[0010] In an optional embodiment, in the step s100, a plurality of first drive motors are connected in series, and the plurality of first drive motors connected in series output torque and rotation speed to the input shaft of the gearbox of the twin-screw plastic extruder.
[0011] Based on the above solution, by connecting multiple first drive motors in series, a greater input power can be obtained, thereby meeting the speed condition requirements of the loading test.
[0012] In an optional embodiment, in the step s100, a plurality of first loading motors are connected in series, and the plurality of first loading motors connected in series output torque to the output short shaft of the twin-screw plastic extruder gearbox.
[0013] Based on the above solution, multiple first loading motors are connected in series to obtain greater loading power, thereby meeting different loading test requirements.
[0014] In an optional embodiment, in step s200, multiple second drive motors are connected in series, and the multiple second drive motors connected in series are connected to an output gearbox, and the output gearbox is used to transmit torque to the input shaft of the twin-screw plastic extruder gearbox.
[0015] Based on the above scheme, by connecting multiple second drive motors in series and cooperating with the output test gearbox, a larger input torque can be obtained by decelerating and increasing the torque, thereby meeting the torque condition requirements of the loading test.
[0016] In an optional embodiment, in the step s200, a plurality of second loading motors are connected in series, and the plurality of second loading motors connected in series output torque to the output short shaft of the twin-screw plastic extruder gearbox.
[0017] Based on the above solution, multiple second loading motors are connected in series to obtain greater loading power, thereby meeting different loading test requirements.
[0018] In a second aspect, the present invention provides a twin-screw plastic extruder gearbox loading test system, which is applied to the twin-screw plastic extruder gearbox test system described in any one of the aforementioned embodiments, and the loading test system comprises:
[0019] A test bench, a driving device and a loading device, wherein the test bench is used to position a twin-screw plastic extruder gear box to be loaded, and the driving device and the loading device are both installed on the test bench, the driving device is used to be connected to the input shaft of the twin-screw plastic extruder gear box to transmit torque to the input shaft; the loading device is used to be connected to the output short shaft of the twin-screw plastic extruder gear box to transmit torque to the output short shaft.
[0020] In an optional embodiment, the driving device includes multiple first motors, a first test gearbox, a first coupling and a first torque meter, all of which are installed on the test bench, and the multiple first motors are connected in series; the first test gearbox has a switchable working state and a non-working state, and when in the working state, the multiple first motors are connected to the first coupling through the first test gearbox; when in the non-working state, the multiple first motors are directly connected to the first coupling; the first coupling is connected to the first torque meter, and the first torque meter is used to connect to the input shaft.
[0021] Based on the above scheme, when a rated speed loading test is required, multiple first motors connected in series are connected to the first coupling, and the first coupling is connected to the input shaft of the gearbox to be tested through the first torque meter. After the multiple first motors connected in series are started, the gearbox to be tested is operated at the rated speed. The torque acting on the output short shaft of the gearbox to be tested is adjusted by the loading device, so as to perform the rated speed loading test.
[0022] In an optional embodiment, the test bench is provided with a positioning structure for positioning the first test gearbox.
[0023] Based on the above solution, by setting a positioning structure, the position of the first test gearbox is more stable and reliable, and it is easy to install.
[0024] In an optional embodiment, the loading device includes multiple second motors, a second test gearbox, a second coupling and a second torque meter, all of which are installed on the test bench, and the multiple second motors are connected in series; the multiple second motors are connected to the second torque meter, and the second torque meter is connected to the second test gearbox via a second coupling, and the second test gearbox is used to connect to the output short shaft.
[0025] Based on the above scheme, during the loading process, the second motor is started, and the output power is adjusted through the second accompanying gearbox, thereby adjusting the torque acting on the output short shaft to achieve adjustment of the loading conditions.
[0026] In an optional embodiment, the loading device further includes a third coupling, the second test gearbox is connected to the third coupling, and the third coupling is used to be connected to the output stub shaft.
[0027] Based on the above scheme, the second test gearbox is connected to the gearbox to be tested through the third coupling to facilitate the transmission of torque.
[0028] The beneficial effects of the embodiments of the present invention include, for example:
[0029] In summary, the twin-screw plastic extruder gearbox loading test method provided in this embodiment, by respectively performing rated speed loading test and rated torque loading test on the twin-screw plastic extruder gearbox, can reduce the difficulty of the test and reduce the power demand of the driving device for the loading test compared to directly performing rated power loading test on the gearbox to be tested. By performing rated speed loading test on the twin-screw plastic extruder gearbox, relevant parameters such as bearing and lubricating oil temperature rise, operating noise and current loading efficiency of the gearbox to be tested can be obtained; by performing rated torque loading test on the twin-screw plastic extruder gearbox, relevant parameters such as gear meshing spots, full load vibration and current loading efficiency can be obtained. By adopting rated torque loading and rated speed loading, the relevant parameters obtained by the two are combined to be basically consistent with the parameters that can be obtained by adopting rated power loading, so that the faults existing in the transmission components of the gearbox to be tested can be effectively obtained, and the improved design of the gearbox can be provided with guiding significance. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.
[0031] Figure 1 A schematic diagram of a first state of a twin-screw plastic extruder gearbox loading test system provided in an embodiment of the present application;
[0032] Figure 2 A schematic diagram of the second state of the twin-screw plastic extruder gearbox loading test system provided in an embodiment of the present application.
[0033] icon:
[0034] 001-gearbox to be tested; 011-input shaft; 012-output stub shaft; 100-driving device; 110-first motor; 120-first test gearbox; 130-first coupling; 140-first torque meter; 200-loading device; 210-second motor; 220-second test gearbox; 230-second coupling; 240-second torque meter; 250-third coupling. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.
[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0038] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0039] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.
[0040] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.
[0041] In the prior art, since the rated power of some models of twin-screw plastic extruder gearboxes is relatively large, when performing a gearbox loading test, the motor combination cannot provide sufficient power to operate the gearbox at the rated power, and the gearbox cannot be loaded and tested using the rated power loading method. Therefore, the parameters obtained from the loading test of the twin-screw plastic extruder gearbox in the prior art are not the relevant parameters under the rated power, and the reliability of the parameter results obtained from the loading test is poor.
[0042] In view of this, the designer provides a twin-screw plastic extruder gearbox loading test method, which conducts rated speed loading test and rated torque loading test on the twin-screw plastic extruder gearbox respectively. The combination of the parameters obtained by the two can fully reflect the data of the rated power loading test, thereby improving the accuracy and reliability of the test results, and has high reference value and guiding significance.
[0043] This embodiment provides a twin-screw plastic extruder gearbox loading test method, which includes the following steps:
[0044] Step s100, performing a rated speed loading test on the twin-screw plastic extruder gearbox;
[0045] Step s200, performing a rated torque loading test on the twin-screw plastic extruder gearbox.
[0046] It should be noted that the above two steps are only for the convenience of description, and the order of the two steps is not specifically limited. Step s100 can be first, or step s200 can be first.
[0047] As described above, the twin-screw plastic extruder gearbox loading test method of the present application has at least the following beneficial effects:
[0048] By performing a rated speed loading test and a rated torque loading test on the twin-screw plastic extruder gearbox respectively, the test difficulty can be reduced, and the power requirement of the driving device 100 for the loading test can be reduced compared to directly performing a rated power loading test on the gearbox 001 to be tested. When performing a rated speed loading test on the twin-screw plastic extruder gearbox, relevant parameters such as the bearing and lubricating oil temperature rise, operating noise, and current loading efficiency of the gearbox 001 to be tested can be obtained; by performing a rated torque loading test on the twin-screw plastic extruder gearbox, relevant parameters such as gear meshing spots, full load vibration, and current loading efficiency can be obtained. The combination of the relevant parameters obtained by the rated torque loading and the rated speed loading is basically consistent with the parameters that can be obtained by the rated power loading, so that the faults existing in the transmission components of the gearbox 001 to be tested can be effectively obtained, and the improved design of the gearbox can be provided with guiding significance.
[0049] The details of the twin-screw plastic extruder gearbox loading test method of the embodiment of the present application are described below by way of example.
[0050] Optionally, in step s100, multiple first drive motors are connected in series, and multiple first drive motors matched in series output torque and speed to the input shaft 011 of the twin-screw plastic extruder gearbox. By connecting multiple first drive motors in series, a larger input power can be obtained, thereby meeting the requirements of the loading test for speed conditions.
[0051] Optionally, in step s100, multiple first loading motors are connected in series, and the multiple first loading motors connected in series output torque to the output short shaft 012 of the twin-screw plastic extruder gearbox. Multiple first loading motors are connected in series to obtain greater loading power, thereby meeting different loading test requirements.
[0052] Optionally, in step s200, multiple second drive motors are connected in series, and the multiple second drive motors matched in series are connected to the output test gearbox, and the output test gearbox is used to transmit the torque to the input shaft 011 of the twin-screw plastic extruder gearbox. By connecting multiple second drive motors in series and matching the output test gearbox, a larger input torque can be obtained by decelerating and increasing the torque, thereby meeting the torque condition requirements of the loading test.
[0053] Optionally, in step s200, multiple second loading motors are connected in series, and multiple second loading motors connected in series output torque to the output short shaft 012 of the twin-screw plastic extruder gearbox. Multiple second loading motors connected in series can obtain greater loading power, thereby meeting different loading test requirements.
[0054] It should be noted that the rated speed loading and rated torque loading tests are conducted separately, which reduces the difficulty of the loading test and the requirements of the loading test on the drive motor and the loading motor, thereby reducing the processing and manufacturing costs. That is, compared with the rated power loading, the power of the drive motor required for the rated speed loading and the rated torque loading can be designed to be lower, thereby reducing the manufacturing cost and the operating cost. Similarly, compared with the rated power loading, the power of the loading motor required for the rated speed loading and the rated torque loading can be designed to be lower, thereby reducing the manufacturing cost and the operating cost.
[0055] Please refer to Figure 1 and Figure 2 This embodiment also provides a twin-screw plastic extruder gearbox loading test system, which is applied to the above-mentioned twin-screw plastic extruder gearbox test system, and the loading test system includes a test bench, a driving device 100 and a loading device 200. The test bench is used to position the twin-screw plastic extruder gearbox to be loaded, and the driving device 100 and the loading device 200 are both installed on the test bench. The driving device 100 is used to connect with the input shaft 011 of the twin-screw plastic extruder gearbox to transmit torque to the input shaft 011; the loading device 200 is used to connect with the output short shaft 012 of the twin-screw plastic extruder gearbox to transmit torque to the output short shaft 012.
[0056] Please combine Figure 1 and Figure 2In this embodiment, the driving device 100 optionally includes a plurality of first motors 110, a first test gearbox 120, a first coupling 130 and a first torque meter 140, all of which are installed on the test bench. The plurality of first motors 110 are connected in series; the first test gearbox 120 has a switchable working state and a non-working state. When in the working state, the plurality of first motors 110 are connected to the first coupling 130 through the first test gearbox 120; when in the non-working state, the plurality of first motors 110 are directly connected to the first coupling 130; the first coupling 130 is connected to the first torque meter 140, and the first torque meter 140 is used to connect to the input shaft 011.
[0057] It should be understood that when a rated torque loading test is required, the first test gearbox 120 can be connected to the first motor 110 through a coupling to improve the stability of torque transmission. When a rated speed loading test is required, multiple first motors 110 connected in series are connected to the first coupling 130, and the first coupling 130 is connected to the input shaft 011 of the gearbox to be tested through the first torque meter 140. After the multiple first motors 110 connected in series are started, the gearbox 001 to be tested is operated at the rated speed. The torque acting on the output short shaft 012 of the gearbox 001 to be tested is adjusted by the loading device 200, so as to perform a rated speed loading test.
[0058] It should be understood that a positioning structure for positioning the first test gearbox 120 can be provided on the test bench. When a rated torque loading test is required, the first test gearbox 120 can be quickly positioned using the positioning structure, and the installation and positioning of the first test gearbox 120 is convenient, and the position is accurate and reliable.
[0059] It should be noted that in this embodiment, the number of the first motors 110 can be two. When the first motor 110 is used for the rated speed loading test, the first motor 110 can also be called the first drive motor, and when the first motor 110 is used for the rated torque loading test, the first motor 110 can also be called the second drive motor.
[0060] Please refer to Figure 1 and Figure 2 In this embodiment, optionally, the loading device 200 includes a plurality of second motors 210, a second test gearbox 220, a second coupling 230, a second torque meter 240 and a third coupling 250, all of which are installed on the test bench. The plurality of second motors 210 are connected in series; the plurality of second motors 210 are connected to the second torque meter 240, the second torque meter 240 is connected to the second test gearbox 220 through the second coupling 230, and the second test gearbox 220 is used to be connected to the output short shaft 012 through the third coupling 250.
[0061] It should be noted that in this embodiment, the number of the second motors 210 can be two. When the second motor 210 is used for the rated speed loading test, the second motor 210 can also be called the first loading motor, and when the second motor 210 is used for the rated torque loading test, the second motor 210 can also be called the second loading motor.
[0062] In addition, the first coupling 130, the second coupling 230 and the third coupling 250 can all be configured as diaphragm couplings. The first torque meter 140 and the second torque meter 240 are existing well-known structures and are not specifically limited in this embodiment.
[0063] In addition, the structures of the first test gearbox 120 and the second test gearbox 220 can be set to be different and can be designed as needed.
[0064] The twin-screw plastic extruder gearbox loading test system provided in this embodiment can obtain relevant parameters such as bearing and lubricating oil temperature rise, operating noise and current loading efficiency of the gearbox 001 to be tested by performing a rated speed loading test on the twin-screw plastic extruder gearbox. By performing a rated torque loading test on the twin-screw plastic extruder gearbox, relevant parameters such as gear meshing spots, full load vibration and current loading efficiency can be obtained. The combination of the relevant parameters obtained by the rated torque loading and the rated speed loading is basically consistent with the parameters that can be obtained by the rated power loading, so that the faults existing in the transmission components of the gearbox 001 to be tested can be effectively obtained, and the improved design of the gearbox can be provided with guidance.
[0065] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. A twin-screw plastic extruder gearbox loading test method, characterized in that: The loading test method comprises the following steps: Step s100, performing a rated speed loading test on the twin-screw plastic extruder gearbox; Step s200, performing a rated torque loading test on the twin-screw plastic extruder gearbox.
2. The twin-screw plastic extruder gearbox loading test method according to claim 1, characterized in that: In the step s100, a plurality of first drive motors are connected in series, and the plurality of first drive motors connected in series output torque and rotation speed to the input shaft (011) of the gearbox of the twin-screw plastic extruder.
3. The twin-screw plastic extruder gearbox loading test method according to claim 1, characterized in that: In the step s100, a plurality of first loading motors are connected in series, and the plurality of first loading motors connected in series output torque to the output short shaft (012) of the gear box of the twin-screw plastic extruder.
4. The twin-screw plastic extruder gearbox loading test method according to claim 1, characterized in that: In step s200, multiple second drive motors are connected in series, and the multiple second drive motors connected in series are connected to an output gearbox, and the output gearbox is used to transmit torque to the input shaft (011) of the twin-screw plastic extruder gearbox.
5. The twin-screw plastic extruder gearbox loading test method according to claim 1, characterized in that: In the step s200, a plurality of second loading motors are connected in series, and the plurality of second loading motors connected in series output torque to the output short shaft (012) of the gear box of the twin-screw plastic extruder.
6. A twin-screw plastic extruder gearbox loading test system, characterized in that: A test system for a twin-screw plastic extruder gearbox according to any one of claims 1 to 5, the loading test system comprising: A test bench, a drive device (100) and a loading device (200), wherein the test bench is used to position a twin-screw plastic extruder gearbox to be loaded, the drive device (100) and the loading device (200) are both installed on the test bench, the drive device (100) is used to be connected to an input shaft (011) of the twin-screw plastic extruder gearbox, and is used to transmit torque to the input shaft (011); the loading device (200) is used to be connected to an output short shaft (012) of the twin-screw plastic extruder gearbox, and is used to transmit torque to the output short shaft (012).
7. The test system for a twin-screw plastic extruder gearbox according to claim 6, characterized in that: The driving device (100) comprises a plurality of first motors (110), a first test gearbox (120), a first coupling (130) and a first torque meter (140) all mounted on the test bench, wherein the plurality of first motors (110) are connected in series; the first test gearbox (120) has a switchable working state and a non-working state; when in the working state, the plurality of first motors (110) are connected to the first coupling (130) via the first test gearbox (120); when in the non-working state, the plurality of first motors (110) are directly connected to the first coupling (130); the first coupling (130) is connected to the first torque meter (140), and the first torque meter (140) is used to be connected to an input shaft (011).
8. The test system for a twin-screw plastic extruder gearbox according to claim 7, characterized in that: The test bench is provided with a positioning structure for positioning the first accompanying test gearbox (120).
9. The test system for a twin-screw plastic extruder gearbox according to claim 6, characterized in that: The loading device (200) comprises a plurality of second motors (210), a second test gearbox (220), a second coupling (230) and a second torque meter (240) all mounted on the test bench, wherein the plurality of second motors (210) are connected in series; the plurality of second motors (210) are connected to the second torque meter (240), the second torque meter (240) is connected to the second test gearbox (220) via the second coupling (230), and the second test gearbox (220) is used to be connected to the output stub shaft (012).
10. The test system for a twin-screw plastic extruder gearbox according to claim 9, characterized in that: The loading device (200) further comprises a third coupling (250), the second test gearbox (220) is connected to the third coupling (250), and the third coupling (250) is used to be connected to the output stub shaft (012).